Directory

1943 CE

A year in which the tide of war turned decisively against the Axis powers: Germany suffered catastrophic defeat at Stalingrad and Kursk, the Allies invaded Sicily and Italy, and the Tehran Conference brought together Roosevelt, Churchill, and Stalin to plan the final stages of the war.

Geopolitics & Diplomacy

  • The Tehran Conference in November and December brought together Roosevelt, Churchill, and Stalin for the first time, where they agreed on plans for the invasion of Western Europe and the postwar order.
  • The Casablanca Conference in January saw Roosevelt and Churchill agree on the policy of unconditional surrender for the Axis powers and plan the invasion of Sicily.
  • Italy's Fascist Grand Council voted to remove Benito Mussolini from power on July 25, and King Victor Emmanuel III had him arrested and replaced by Marshal Pietro Badoglio.
  • Italy signed an armistice with the Allies on September 8, though Germany quickly occupied most of the country and continued fighting.
  • The Cairo Conference in November saw Roosevelt and Churchill meet with Chiang Kai-shek to discuss Allied strategy in Asia and the postwar status of Japanese-held territories.
  • Lebanon declared independence from France on November 22, though full French withdrawal would not occur until after the war.
  • The Soviet Union dissolved the Comintern in May as a gesture of goodwill toward its Western Allies, signaling a temporary easing of ideological tensions.
  • Argentina's military staged a coup in June, bringing to power a junta that included Colonel Juan Perón, who would rise to prominence in the following years.
  • The Katyn massacre was revealed in April when Germany announced the discovery of mass graves of Polish officers killed by the Soviet secret police, causing a rupture between Poland's government-in-exile and the Soviet Union.
  • The United Nations Relief and Rehabilitation Administration was established in November to plan for the provision of aid to liberated areas.

Conflict & Security

  • The German Sixth Army surrendered at Stalingrad on February 2, ending one of the war's most devastating battles and marking a major turning point on the Eastern Front.
  • The Battle of Kursk in July was the largest tank battle in history, ending in a decisive Soviet victory that permanently shifted the initiative on the Eastern Front to the Red Army.
  • Allied forces invaded Sicily on July 10 in Operation Husky, capturing the island in five weeks and opening the way for the invasion of mainland Italy.
  • Allied forces landed on the Italian mainland at Salerno on September 9, beginning a grinding campaign up the Italian peninsula against determined German resistance.
  • The Warsaw Ghetto Uprising began on April 19 when Jewish fighters resisted the German attempt to liquidate the ghetto, fighting for nearly a month before being crushed.
  • The Allied strategic bombing campaign against Germany intensified, with the Royal Air Force conducting nighttime area bombing and the U.S. Army Air Forces carrying out daytime precision raids.
  • The Battle of the Atlantic turned in favor of the Allies in May, with improved tactics, radar, code-breaking, and escort carriers dramatically reducing U-boat sinkings of merchant ships.
  • American forces completed the recapture of Guadalcanal in February after six months of brutal fighting, securing a key position in the Solomon Islands.
  • The dam-busting raids of May 16-17 saw specially modified RAF Lancaster bombers destroy two major dams in Germany's Ruhr Valley using bouncing bombs designed by Barnes Wallis.
  • Allied forces fought through brutal jungle terrain in New Guinea and Burma, slowly pushing back Japanese forces in the Southwest Pacific and Southeast Asian theaters.

Economy & Finance

  • American war production reached staggering levels, with factories producing nearly 86,000 aircraft, 45,000 tanks, and millions of tons of shipping during the year.
  • The pay-as-you-go income tax system was introduced in the United States through the Current Tax Payment Act, requiring employers to withhold taxes from wages.
  • Wartime rationing continued across the Allied nations, with price controls and coupon systems governing the distribution of food, fuel, and consumer goods.
  • Germany's war economy was reorganized under Albert Speer, who dramatically increased armaments production despite Allied bombing of industrial targets.
  • The Bretton Woods planning process began with preliminary discussions among Allied economists about the design of a postwar international monetary system.
  • The Soviet war economy operated at full capacity, with factories relocated beyond the Urals producing vast quantities of tanks, aircraft, and ammunition.
  • Britain's national debt grew substantially as the country continued to finance its war effort through borrowing and American Lend-Lease assistance.
  • Forced labor became an integral part of the German economy, with millions of prisoners of war and civilians from occupied countries compelled to work in factories and mines.
  • Japan's economy strained under the pressures of a multi-front war, with American submarine campaigns beginning to disrupt supply lines from Southeast Asia.
  • Agricultural output in liberated areas of the Soviet Union slowly recovered as collective farms returned to production on land recaptured from German occupation.

Technology & Infrastructure

  • The Colossus computer was developed and constructed at the Post Office Research Station at Dollis Hill for use at Bletchley Park, with the first machine delivered in early 1944.
  • The Pentagon was completed in January, becoming the world's largest office building and the headquarters of the U.S. Department of War.
  • Germany began production of the V-1 flying bomb, a pulse-jet-powered cruise missile that would be launched against Britain the following year.
  • The development of proximity fuses by the Allies provided artillery shells that detonated near their targets without requiring a direct hit, greatly increasing their effectiveness.
  • The German Messerschmitt Me 262, the world's first operational jet-powered fighter aircraft, made its first test flights with jet engines, though it would not enter combat service until 1944.
  • Synthetic rubber production in the United States expanded dramatically, reducing dependence on natural rubber supplies cut off by Japanese occupation of Southeast Asia.
  • The Chicago subway system opened its first line on October 17, providing rapid transit service beneath the city's State Street.
  • Amphibious landing craft, including the LCVP (Higgins boat), were produced in enormous quantities, enabling the large-scale opposed landings that characterized Allied operations.
  • Improved sonar and depth charge technology helped Allied navies detect and destroy German U-boats more effectively in the Battle of the Atlantic.
  • The Jefferson Memorial in Washington, D.C., was dedicated on April 13, the 200th anniversary of Thomas Jefferson's birth.

Science & Discovery

  • Albert Hofmann accidentally discovered the psychoactive effects of LSD on April 19 while working at Sandoz Laboratories in Basel, Switzerland.
  • Selman Waksman and Albert Schatz isolated streptomycin from soil bacteria at Rutgers University, discovering the first antibiotic effective against tuberculosis.
  • The gruesome medical experiments conducted by Nazi doctors in concentration camps continued, drawing postwar condemnation and establishing the ethical principles later codified in the Nuremberg Code.
  • Willem Kolff built the first functioning dialysis machine in the occupied Netherlands, using it to treat patients with kidney failure.
  • Oswald Avery, Colin MacLeod, and Maclyn McCarty conducted experiments at the Rockefeller Institute demonstrating that DNA was the substance responsible for hereditary transformation in bacteria.
  • The Manhattan Project expanded to multiple sites including Oak Ridge, Tennessee, and Hanford, Washington, as scientists and engineers worked to produce fissile material for atomic weapons.
  • Jacques Cousteau and Émile Gagnan developed the Aqua-Lung, a self-contained underwater breathing apparatus that would revolutionize diving and marine exploration.
  • Research on nuclear reactors progressed at several Manhattan Project sites, with scientists developing methods for producing and separating plutonium.
  • The theory of stellar nucleosynthesis was advanced by physicists studying how elements are formed inside stars through nuclear fusion reactions.
  • Nikolai Semyonov continued his research on chemical chain reactions in the Soviet Union, work that would contribute to the understanding of combustion and explosions.

Health & Medicine

  • Streptomycin was isolated and shown to be effective against tuberculosis, offering the first real treatment for a disease that had killed millions.
  • Penicillin production scaled up dramatically in the United States, with enough supply to treat wounded soldiers at the front and begin limited civilian distribution.
  • Willem Kolff's dialysis machine in the Netherlands treated its first patients, establishing the principle of artificial kidney function.
  • The Bengal famine reached its peak, killing an estimated two to three million people in eastern India due to a combination of wartime disruption, policy failures, and natural disaster.
  • DDT was used extensively by Allied forces to control lice and mosquitoes, dramatically reducing cases of typhus and malaria in military camps and liberated areas.
  • Nazi medical experiments continued in concentration camps, with prisoners subjected to freezing, high-altitude pressure tests, and deliberate infection with diseases.
  • The U.S. military expanded its psychiatric services as combat stress and psychological casualties became recognized as significant medical issues.
  • Famine and disease claimed hundreds of thousands of lives in war-torn China, where years of fighting had disrupted food production and public health systems.
  • Blood plasma and whole blood transfusion services continued to expand, saving the lives of thousands of wounded soldiers across all theaters of war.
  • The Papanicolaou smear test for detecting cervical cancer gained wider acceptance in the medical community after George Papanicolaou published his findings on the diagnostic method.

Climate & Environment

  • Atmospheric carbon dioxide concentrations stood at approximately 309 parts per million.
  • The Great Smoky Mountains National Park continued to serve as a protected wilderness area, though wartime restrictions limited civilian access and park staffing.
  • Wartime bombing devastated urban and rural landscapes across Europe, North Africa, and Asia, destroying ecosystems and contaminating land and water.
  • Timber harvesting intensified in North America to meet wartime construction demands, with forests in the Pacific Northwest and other regions heavily logged.
  • A severe hurricane struck the Texas Gulf Coast on July 27, causing significant damage and loss of life in the Galveston and Houston areas.
  • Agricultural output remained disrupted across much of the world, with war-related food shortages affecting civilian populations on multiple continents.
  • Mining operations for strategic minerals expanded in Africa, South America, and other regions, often with minimal regard for environmental consequences.
  • The Great Blizzard of 1943 struck the northern Great Plains in March, bringing extreme cold and heavy snow to the Dakotas, Minnesota, and surrounding states.
  • The destruction of the Mohne and Eder dams in Germany's Ruhr Valley by RAF bombers in May caused massive flooding that devastated farmland and communities downstream.
  • Oil extraction in the Middle East and the Americas continued to expand to meet the enormous fuel demands of mechanized warfare.

Culture & Society

  • The world population stood at approximately 2.33 billion people.
  • Mrs. Miniver won the Academy Award for Best Picture at the 15th Academy Awards ceremony held on March 4.
  • Rodgers and Hammerstein's musical Oklahoma! opened on Broadway on March 31, revolutionizing the American musical with its integration of song, dance, and dramatic storytelling.
  • Antoine de Saint-Exupéry published The Little Prince in New York, creating one of the most beloved works of children's literature.
  • The jitterbug and swing dancing remained popular across the United States and among Allied troops stationed abroad.
  • The All-American Girls Professional Baseball League was founded, providing professional baseball opportunities for women as male players served in the military.
  • Jean-Paul Sartre published Being and Nothingness, a foundational text of existentialist philosophy.
  • The Detroit race riot erupted in June, lasting three days and resulting in 34 deaths, reflecting deep racial tensions in wartime industrial cities.
  • The zoot suit riots occurred in Los Angeles in June, with U.S. servicemen attacking young Mexican Americans and other minorities wearing the distinctive wide-legged suits.
  • Ayn Rand published The Fountainhead, a novel celebrating individualism and architectural ambition that became a bestseller.