What was significant about the cities of hanoi and saigon in relation to the war?

The strait of magellan connects the atlantic ocean with the a amazon river b. gulf of mexico c. pacific ocean d. caribbean sea select the best answer from the choices provided о а b oo оо

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.

Was the civil war inevitable? could anything have been done through compromise to stop it, or did it have to happen?