Before the war, Austria-Hungary angered many by trying to expand its power in Europe.
The assassination of Archduke Franz Ferdinand sparked the start of the war.
In response to this event, Austria-Hungary invaded Serbia and the war began.
During World War I, England, France, and Russia made up the Allied Powers

yes.

explanation:

because it let the japanese know who had the upper hand in the war.

its c not d   tell me if that´s correct

the  seven  days  battles  were  a series of seven battles over seven  days from june 25 to july 1, 1862, near richmond, virginia,  during  the american civil war. the  seven  days ended with mcclellan's army in relative safety next to the james river, having suffered almost 16,000 casualtiesduring  the retreat.