September 28 in Military History

Duke William of Normandy landed his invasion fleet at Pevensey on the south coast of England three days after King Harold Godwinson's victory at Stamford Bridge. The unopposed landing began the campaign that would end at Hastings on October 14 and transform England's political, linguistic, and military culture.

Combined American and French forces began the Siege of Yorktown, trapping Cornwallis's British army. The siege would end with the decisive British surrender that effectively won the American Revolution.

President Millard Fillmore signed legislation abolishing flogging as a punishment aboard U.S. Navy ships. The reform ended a centuries-old naval disciplinary practice, required the Navy to develop alternative methods of enforcing discipline, and shaped a generation of debates about the relationship between punishment and combat effectiveness in the sailing and early steam fleets.

Belgian, British, and French forces launched the Fifth Battle of Ypres, part of the Grand Offensive that was breaking the German army. The Belgian army, fighting on the last scrap of unoccupied Belgian territory, advanced alongside the British Second Army through the mud and devastation of the Ypres Salient.

U.S. Army Air Service Douglas World Cruisers Chicago and New Orleans landed at Seattle, Washington, completing the first circumnavigation of the globe by aircraft. The 175-day, 27,553-mile flight established American aviation credibility, demonstrated the operational feasibility of long-range air power, and produced engineering lessons that shaped interwar transport and bomber design.

Scottish bacteriologist Alexander Fleming discovered penicillin at St. Mary's Hospital in London when he noticed that a contaminating mold had killed staphylococci growing on a petri dish. The discovery would transform wartime medicine during the Second World War, cutting fatal infection rates for wounded soldiers and enabling surgical advances unthinkable in the pre-antibiotic era.

Germany and the Soviet Union signed the German-Soviet Boundary and Friendship Treaty, formally partitioning Poland between them. The agreement, following the Molotov-Ribbentrop Pact, divided Poland along the Bug River line. The partition condemned millions of Poles to years of brutal occupation by both totalitarian regimes.

German Einsatzgruppen and Wehrmacht forces began the Babi Yar massacre near Kyiv, Ukraine. Over two days, 33,771 Jewish men, women, and children were marched to a ravine and systematically shot, the largest single mass shooting of the Holocaust. The massacre was carried out by Sonderkommando 4a of Einsatzgruppe C, assisted by German police and Ukrainian auxiliary police.

The last organized resistance of the British 1st Airborne Division at Arnhem ended. Of approximately 10,000 men who had been deployed, only 2,163 escaped across the Rhine. The failure at Arnhem meant that Operation Market Garden had not achieved its ultimate objective of crossing the Rhine, prolonging the war into 1945.

The passenger ferry MS Estonia sank in the Baltic Sea between Tallinn and Stockholm, killing 852 people. Nordic, Baltic, and NATO naval and coast guard units conducted one of the largest peacetime maritime rescue operations in European waters, validating the post-Cold War cooperative security architecture emerging in the region.