July 15
- 1240 - A Novgorodian army led by Alexander Nevsky defeats the Swedes in the Battle of the Neva.
- 1410 - Battle of Grunwald, allied forces of the Kingdom of Poland and the Grand Duchy of Lithuania defeat the army of the Teutonic Order.
- 1862 - American Civil War: Confederates break naval blockade of Vicksburg, Mississippi.
- 1918 - World War I: Second Battle of the Marne - The battle begins near the River Marne with a German attack.
- 1958 - In Lebanon, 5,000 United States Marines land in the capital Beirut in order to provide military support to the pro-Western government there.
July 15
- 1240 - A Novgorodian army led by Alexander Nevsky defeats the Swedes in the Battle of the Neva.
- 1410 - Battle of Grunwald, allied forces of the Kingdom of Poland and the Grand Duchy of Lithuania defeat the army of the Teutonic Order.
- 1862 - American Civil War: Confederates break naval blockade of Vicksburg, Mississippi.
- 1918 - World War I: Second Battle of the Marne - The battle begins near the River Marne with a German attack.
- 1958 - In Lebanon, 5,000 United States Marines land in the capital Beirut in order to provide military support to the pro-Western government there.