What did thomas jefferson mean when he referred to his successful bid for the presidency in 1800 as the "revolution of 1800? "?

How long ago was the fall of rome (in years)

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 role did the alliance system play in preventing austria-hungary and serbia from coming to a compromise settlement?