User:Hawkeye7/War/Selected anniversaries/July 23

July 23

 * 1862 - American Civil War: Henry W. Halleck takes command of the Union Army.
 * 1914 - Austria-Hungary issues an ultimatum to Serbia allowing the Austrians to find out who killed Archduke Franz Ferdinand. When Serbia denies Austria-Hungary their demands World War I is sparked on July 28, 1914
 * 2003 - Operation Warrior Sweep is the first major military deployment of the Afghan National Army.