21st April 1919
Polish Army entering the city of Wilno (Vilnius, Lithuania) after taking the city from the Russian Red Army.
Jules Védrines, French aviator known for being the first pilot to fly faster than 100 mph, is killed in an aviation accident.
British soldiers and German children enjoying a carousel ride at Easter fair in occupied Cologne, Germany.
New York: The 332nd Infantry marches up Fifth Avenue on their way to Central Park, where they will receive medals from the Italian Attache for fighting in Italy against the Austrians.
Ship Losses:
AG-21 (Imperial Russian Navy White Movement) The AG-class submarine was scuttled at Sevastopol by the British.