July 1914

Saturday 11:

Babe Ruth debuts in Major league baseball.

Saturday 18:

The United States Army's Signal Corps is formed, giving definite status to its air service for the first time.

Monday 20:

Russia: Czar Nicholas II welcomes France's President Raymond Poincaré.

Thursday 23:

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

Tuesday 28:

World War I begins: Austria-Hungary declares war on Serbia after it failed to meet the conditions of an ultimatum it set on July 23 following the killing of Archduke Francis Ferdinand by a Serbian assassin. This event leads to the outbreak of war.