A naval Curtiss aircraft NC-4 commanded by Albert Cushing Read leaves Trepassey, Newfoundland, for Lisbon via the Azores on the first transatlantic flight.

The Washington Naval Treaty is signed in Washington, D.C., limiting the naval armaments of United States, Britain, Japan, France, and Italy.

German-occupied Denmark scuttles most of its navy; Germany dissolves the Danish government.

U.S. Army private Barry Winchell dies from baseball-bat injuries inflicted in his sleep the previous day by a fellow soldier, Calvin Glover, for his relationship with transgender showgirl and former Navy Corpsman Calpernia Addams.

An EP-3E United States Navy surveillance aircraft collides with a Chinese People's Liberation Army Shenyang J-8 fighter jet. The Navy crew makes an emergency landing in Hainan, People's Republic of China and is detained.