What was the first country to declare war?
Which country made the first declaration of war in ww2?
When was the first world war declared?
Who joined World war 1?
When did America enter in First World War?
Which country attacked first in ww1?
On July 28, Austria-Hungary declared war on Serbia, and the tenuous peace between Europe’s great powers collapsed. On July 29, Austro-Hungarian forces began to shell the Serbian capital of Belgrade, and Russia, Serbia’s ally, ordered a troop mobilization against Austria-Hungary.