EUROPEAN COUNTRIES FORMED ALLIANCES AND INCREASED SIZES OF ARMED FORCES

caused rivalries over colonies and trade

Germany, Austria-Hungary, and Italy

France, Great Britain, and Russia

spread prior to 1914 and WW1.

and his wife were assassinated on June 28, 1914.

Serbian terrorist group who killed Ferdinand, the heir to the throne of Austria- Hungry.

AUSTRIA-HUNGARY WENT TO WAR WITH SERBIA. A-H WAS BACKED BY GERMANY AND RUSSIA MOBILIZED FOR SERBIA.

GREAT BRITAIN DECLARED WAR ON GERMANY FOR VIOLATING BELGIAN NEUTRALITY.