1278
August 26 – Kings Rudolph I of Germany and Ladislaus IV of Hungary defeat King Otakar II of Bohemia in the Battle of Marchfield, a match of over 80,000 men and the largest battle of knights in the Middle Ages. The battle ends a power struggle between Rudolph and Otakar over the fate of central Europe, and Rudolph's Habsburg family will continue to rule Austria and other captured territories until the end of World War I in 1918.