Give me a fact that only U. S. army soldiers know. FAST!!!

Following archduke franz ferdinand's assassination, austro-hungarian leaders: a. aided the ottoman empire in its campaign to keep serbia under its control. b. executed nearly all prominent serbs living in austria-hungary c. threatened to invade serbia if serb leaders did not agree to a set of strict demands. d.. formed an alliance with great britain to protect austria-hungary from future attacks.

What does the term “escalation” refer to?

What is one way that the congress of vienna changed the map of europe?