Century

20th Century

940 sourced events. Showing 337-360.

Events

20th Century Timeline

Military 20th Century Oceania

Japanese Victory at Savo Island

In the early phases of the Pacific War during World War II, Allied forces launched Operation Watchtower to seize Guadalcanal in the Solomon Islands from Japanese control. On the night of August 8-9, 1942, a Japanese cruiser squadron under Admiral Gunichi Mikawa approached undetected to attack the Allied invasion fleet anchored off Savo Island. American, Australian, and other Allied ships were caught by surprise due to poor coordination and radar limitations. The Japanese force sank four Allied heavy cruisers in a swift engagement using superior night-fighting tactics and torpedoes. Over 1,000 Allied sailors perished in the disaster. The battle temporarily disrupted Allied naval support for the Guadalcanal landings.

Event Detail US Military Atlas

Military 20th Century Middle East & North Africa

Second Battle of El Alamein Begins in Egypt

After halting Rommel's advance at the First Battle of El Alamein in July, British Eighth Army commander Bernard Montgomery prepared a major offensive in the Egyptian desert. On the night of October 23, 1942, under a full moon, Allied forces opened the attack with a massive artillery barrage involving nearly 1,000 guns. Infantry and armor advanced through minefields in Operation Lightfoot, aiming to break through Axis lines held by German and Italian troops. Rommel, returning from sick leave in Germany, faced severe shortages of fuel and reinforcements. Heavy fighting ensued over the following days as the Allies methodically eroded Axis defenses.

Event Detail US Military Atlas

Military 20th Century Oceania

Battle of the Santa Cruz Islands Fought in Pacific

By late 1942 the Guadalcanal campaign had become a grueling test of endurance for U.S. and Japanese forces in the Solomon Islands. Japanese commanders planned a major offensive to recapture Henderson Field while their carrier force sought to neutralize American naval support. On October 26, carrier aircraft from both sides exchanged strikes north of the Santa Cruz Islands. U.S. forces lost the carrier Hornet and suffered heavy damage to Enterprise, while Japanese carriers Zuiho and Shokaku were damaged and many veteran aircrews lost. Although Japan achieved a tactical victory by sinking an American carrier, its inability to replace experienced pilots proved strategically costly. American forces retained their foothold on Guadalcanal.

Event Detail US Military Atlas

Military 20th Century Oceania

Naval Battle of Guadalcanal Begins in Pacific

By late 1942, the Guadalcanal campaign in the Solomon Islands had become a critical struggle between Allied and Japanese forces for control of the South Pacific. Japanese attempts to reinforce their troops and neutralize the American-held Henderson Field airfield intensified. On November 12, Japanese air attacks targeted U.S. naval Task Force 67 near Guadalcanal, marking the start of a multi-day series of engagements. U.S. forces under Rear Admiral Richmond K. Turner responded amid efforts to land reinforcements and supplies. The battle involved intense surface and air combat over the following days. It resulted in heavy losses on both sides but ultimately strengthened the U.S. position in the Solomons.

Event Detail US Military Atlas

Military 20th Century Russia & Central Asia

Soviets Launch Operation Uranus at Stalingrad

By late 1942, German forces under the Sixth Army had fought their way into Stalingrad during the larger summer offensive aimed at the Caucasus oil fields, leaving Axis flanks thinly held by Romanian, Italian, and other allied units. Soviet planners under Georgy Zhukov and Aleksandr Vasilevsky prepared a massive counteroffensive to encircle the overextended Germans. On November 19, 1942, the Red Army unleashed Operation Uranus with over a million troops, striking the weaker northern and southern flanks held by Romanian armies. The attacks rapidly overwhelmed the defenders, and by November 23 Soviet forces linked up at Kalach, trapping roughly 290,000 Axis troops. Hitler ordered the surrounded forces to hold position and await air resupply rather than attempt a breakout.

Event Detail US Military Atlas

Politics Born On 20th Century North America

Joe Biden Born in Scranton

Joseph Robinette Biden Jr. was born on November 20, 1942, in Scranton, Pennsylvania. His family later moved to Delaware, where Biden attended the University of Delaware before earning a law degree from Syracuse University. After brief work in law and local government, he won election to the U.S. Senate in 1972 at age twenty-nine and served from 1973 until 2009. Biden became particularly associated with the Senate Judiciary and Foreign Relations committees. He served as vice president under Barack Obama from 2009 to 2017 and won the presidency in 2020. As the forty-sixth president from 2021 to 2025, Biden's administration dealt with the COVID-19 pandemic, infrastructure investment, climate and industrial policy, the withdrawal from Afghanistan, Russia's invasion of Ukraine, and...

Event Detail Assassination Attempts

Science 20th Century North America

Fermi Achieves First Self-Sustaining Nuclear Chain Reaction

Amid World War II and fears that Nazi Germany might develop atomic weapons first, the U.S. Manhattan Project pursued controlled nuclear fission. Italian physicist Enrico Fermi led a team constructing Chicago Pile-1, a crude graphite-moderated reactor beneath the stands at the University of Chicago's Stagg Field. On December 2, 1942, the pile achieved the world's first controlled, self-sustaining nuclear chain reaction. Fermi's team carefully monitored neutron levels as cadmium control rods were withdrawn. A coded message relayed success to project leaders, marking the dawn of the atomic age.

Event Detail Guided Physics

Politics 20th Century Middle East & North Africa

Casablanca Conference Opens in Morocco

In late 1942, Allied forces had achieved key victories in North Africa, shifting momentum against the Axis powers during World War II. U.S. President Franklin D. Roosevelt and British Prime Minister Winston Churchill convened a high-level strategy meeting to coordinate the next phases of the war, including operations in Europe and the Pacific. The conference began on January 14, 1943, in Casablanca, French Morocco, and lasted ten days. Participants discussed plans for the invasion of Sicily, intensified bombing of Germany, and a firm policy of demanding unconditional surrender from the Axis nations. French leaders including Charles de Gaulle also participated in discussions about postwar arrangements.

Military 20th Century Russia & Central Asia

German Field Marshal Paulus Surrenders at Stalingrad

The Battle of Stalingrad had raged since August 1942 as German forces sought to capture the city on the Volga River and cut Soviet supply lines. Harsh winter conditions, fierce Soviet resistance, and overextended German supply lines turned the campaign into a costly stalemate. On January 31, 1943, after weeks of encirclement by Soviet troops, German Field Marshal Friedrich Paulus surrendered his Sixth Army headquarters to the Red Army. Approximately 90,000 surviving German soldiers were taken prisoner. The surrender came two days before the remaining pockets of resistance capitulated. It represented the first major defeat of a German army in the field during World War II.

Event Detail US Military Atlas

Military 20th Century Russia & Central Asia

German Surrender Ends Battle of Stalingrad

The Battle of Stalingrad began in August 1942 as Nazi Germany launched a massive offensive to capture the Soviet industrial city on the Volga River during World War II. Soviet defenders held firm through brutal urban fighting and a harsh winter, encircling the German Sixth Army in a counteroffensive. By early 1943, the trapped Axis forces faced total collapse from starvation, cold, and relentless Soviet assaults. On February 2, 1943, the last organized German troops surrendered to the Red Army, with over 90,000 Axis soldiers taken prisoner. The victory came at enormous cost to both sides but marked a decisive shift in the Eastern Front.

Event Detail US Military Atlas

Military 20th Century Oceania

Guadalcanal Declared Secure Ending Pacific Battle

The Battle of Guadalcanal began in August 1942 as U.S. Marines landed to seize a strategic airfield in the Solomon Islands, marking the first major Allied offensive against Japan in the Pacific. Six months of brutal jungle fighting, naval clashes, and air battles followed amid harsh conditions and heavy casualties. On February 9, 1943, Allied authorities declared the island secure after Japanese forces completed their evacuation under cover of night. The victory halted Japanese expansion and secured supply lines toward Australia. It shifted momentum in the Pacific theater toward sustained Allied advances.

Event Detail US Military Atlas

Civil Rights 20th Century Europe

Gestapo Arrests White Rose Leaders Sophie and Hans Scholl

During World War II, a small group of students and professors at the University of Munich formed the White Rose resistance movement to oppose Nazi rule through nonviolent means. Inspired by philosophy, theology, and reports of atrocities, the group produced and distributed leaflets calling for sabotage of the war effort and an end to the regime. On February 18, 1943, siblings Hans and Sophie Scholl distributed copies of the sixth leaflet at the university, tossing remaining pamphlets from an atrium balcony. A janitor witnessed the act and alerted authorities, leading to their immediate arrest by the Gestapo along with seizure of incriminating materials. The arrests triggered further detentions of other members and a swift trial before the People’s Court. Sophie,...

Military 20th Century Oceania

Battle of the Bismarck Sea Begins

In early 1943, Japanese forces sought to reinforce their garrison at Lae, New Guinea, with thousands of troops and supplies to halt Allied advances in the Southwest Pacific. Allied codebreakers detected the convoy of eight transports and eight destroyers carrying about 6,900 soldiers. On March 2, U.S. Fifth Air Force and Royal Australian Air Force bombers and fighters began sustained attacks using new skip-bombing tactics after reconnaissance spotted the ships. Over the next two days the Allies sank all eight transports and four destroyers, shooting down supporting aircraft while suffering minimal losses. Follow-up strikes on March 4 targeted survivors in the water. Only about 1,200 Japanese troops reached Lae, ending seaborne reinforcement attempts.

Event Detail US Military Atlas

Military 20th Century Europe

Warsaw Ghetto Uprising Begins Against Nazis

Following the 1942 deportations that reduced the Warsaw Ghetto population from over 400,000 to around 60,000, Jewish underground groups including the ŻOB prepared defenses with smuggled weapons. On April 19, 1943—the eve of Passover—SS and police units under Jürgen Stroop entered the ghetto to deport remaining inhabitants to death camps. Fighters responded with coordinated gunfire, Molotov cocktails, and ambushes from rooftops and sewers, forcing the Germans to withdraw after suffering casualties on the first day. The uprising continued for nearly a month as Germans systematically burned buildings and flushed out bunkers, ultimately deporting or killing most survivors.

Event Detail US Military Atlas

Military 20th Century Europe

Allies Launch Invasion of Sicily in World War II

In 1943, after victories in North Africa, the Allies planned to open a new front in Europe by targeting the Axis-held island of Sicily as a stepping stone to Italy. Operation Husky involved over 3,000 ships and 160,000 troops from American, British, and Canadian forces under General Dwight D. Eisenhower. Airborne and glider operations began on the night of July 9 amid high winds that scattered troops, while the main amphibious landings occurred on July 10. Axis defenses, primarily Italian with some German units, were quickly overwhelmed in many sectors despite initial confusion. The campaign secured the island by mid-August.

Event Detail US Military Atlas

Military 20th Century Russia & Central Asia

Battle of Prokhorovka Fought in Kursk Offensive

In summer 1943, German forces launched Operation Citadel to pinch off the Kursk salient on the Eastern Front, aiming to regain initiative after Stalingrad. Soviet intelligence and defenses prepared a massive counterstroke. On July 12, the Soviet 5th Guards Tank Army under Pavel Rotmistrov launched a large-scale armored assault against the German II SS Panzer Corps near Prokhorovka village. The engagement featured hundreds of tanks clashing at close range in dust and smoke, with Soviet T-34s and German Panthers and Tigers trading fire throughout the day. Both sides suffered heavy losses, but the Soviet attack halted the German advance and forced a tactical withdrawal.

Event Detail US Military Atlas

Politics 20th Century Europe

Benito Mussolini Ousted by Grand Council and King

After Allied landings in Sicily and mounting war losses, dissent grew within Italy's Fascist leadership. On the night of July 24-25, the Grand Council of Fascism convened in Rome and passed a motion by Dino Grandi stripping Mussolini of command authority, returning powers to King Victor Emmanuel III. The following day, the king dismissed and arrested Mussolini during a meeting at the royal palace. Marshal Pietro Badoglio formed a new government that soon began secret armistice talks with the Allies. The coup ended two decades of Fascist dictatorship amid widespread public relief.

Event Detail US Military Atlas

Military 20th Century Oceania

PT-109 Sunk; Kennedy Saves Crew in Pacific

During World War II in the Solomon Islands campaign, U.S. Navy Lieutenant John F. Kennedy commanded the patrol torpedo boat PT-109 on nighttime operations against Japanese supply lines. In the early hours of August 2, 1943, the Japanese destroyer Amagiri rammed and split the vessel in two, killing two crew members instantly. The remaining eleven survivors clung to wreckage and swam to a nearby island, with Kennedy towing an injured sailor for hours despite his own back injury. The group survived on coconuts and rainwater until rescued days later after Kennedy carved a message on a coconut shell. The incident highlighted the dangers of small-boat warfare in the Pacific theater.

Event Detail US Military Atlas

Military 20th Century Europe

Allies Complete Conquest of Sicily in World War II

By mid-1943, the Allies sought to open a second front in Europe and relieve pressure on the Soviet Union while weakening Axis forces in the Mediterranean. Operation Husky began with landings on July 9-10 involving over 160,000 troops from the United States, Britain, and Canada under General Dwight D. Eisenhower. After weeks of intense fighting across varied terrain, U.S. forces under General George S. Patton raced British troops under General Bernard Montgomery toward the northeastern port of Messina. On August 17, 1943, Allied troops entered Messina, completing the 38-day campaign and securing the entire island. Although many German troops evacuated to the mainland, the victory forced Italian dictator Benito Mussolini's ouster days earlier and opened the way for the invasion...

Event Detail US Military Atlas

Military 20th Century Europe

Italy Announces Surrender to the Allies

After the July 1943 overthrow of Benito Mussolini, Italy's new government under Marshal Pietro Badoglio secretly negotiated with the Allies while still nominally allied with Germany. The Armistice of Cassibile was signed on September 3 but kept confidential to allow Allied landings. On September 8, 1943, General Dwight D. Eisenhower broadcast the announcement from Allied headquarters, followed by Badoglio's confirmation to the Italian public. German forces responded swiftly with Operation Achse, disarming Italian troops and occupying key areas. The announcement triggered immediate chaos in the Italian military and paved the way for the Allied invasion of the Italian mainland the next day.

Event Detail US Military Atlas

Military 20th Century Europe

Italy Switches Sides, Declares War on Germany

Following the Allied invasion of Sicily and the fall of Benito Mussolini's regime in July 1943, Italy's new government under Marshal Pietro Badoglio sought an armistice with the Allies while navigating occupation by German forces. On October 13, 1943, the Italian government formally declared war on Germany, its former Axis partner, and aligned with the Allies in the ongoing global conflict. This reversal came after secret negotiations and the public announcement of the armistice with the Western powers. Italian troops and partisans now fought alongside Allied forces against German units in Italy, turning former battlefields into a new front. The declaration complicated German strategy in southern Europe and bolstered the Allied advance northward.

Event Detail US Military Atlas

Politics 20th Century Middle East & North Africa

Cairo Conference Opens with Roosevelt, Churchill, Chiang

By late 1943, the Allies were coordinating strategy against the Axis powers in multiple theaters of World War II. U.S. President Franklin D. Roosevelt, British Prime Minister Winston Churchill, and Chinese leader Chiang Kai-shek gathered in Cairo, Egypt, beginning November 22 to discuss the Pacific war and postwar Asia. The leaders addressed military operations against Japan, supply issues in China, and territorial restorations after victory. They issued the Cairo Declaration committing to strip Japan of its conquests and support Chinese sovereignty. The meeting also boosted Chiang's international standing as a major Allied power. Discussions set the stage for the subsequent Tehran Conference with Stalin.

Event Detail US Military Atlas

Politics 20th Century Middle East & North Africa

Tehran Conference Opens with Big Three Leaders

By late 1943 the tide of World War II had turned against the Axis powers, yet the Allies still needed to coordinate strategy across distant fronts. On November 28, U.S. President Franklin D. Roosevelt, British Prime Minister Winston Churchill, and Soviet Premier Joseph Stalin met for the first time at the Soviet embassy in Tehran, Iran. Over four days they discussed the long-promised second front in western Europe, Soviet entry against Japan, and postwar arrangements for Germany and Eastern Europe. Stalin pressed for an invasion of France; the Western leaders sought Soviet assurances on Poland and the Baltic states.

Military 20th Century North America

Eisenhower Named Supreme Allied Commander for Overlord

By December 1943, Allied forces had gained momentum in North Africa and Italy while planning the cross-Channel invasion of Europe. President Franklin D. Roosevelt weighed options between top generals for the critical role. On December 24, 1943, he appointed General Dwight D. Eisenhower as Supreme Commander of the Allied Expeditionary Force for Operation Overlord. Eisenhower, who had led successful campaigns in the Mediterranean, assumed overall responsibility for planning and executing the Normandy landings. The decision unified command structures ahead of the largest amphibious operation in history.

Event Detail US Military Atlas