What discovery led to george b. mcclellan's victory over robert e. lee at antietam?

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 is the main reason the united states removed the taliban from power shortly after the september 11 2001 attacks ?

How did the economic impacts of the great depression differ in the united states and in the soviet union?