Which event led directly to the first declarations of war in 1914? A: Great Britain entered into an entente with its long-standing Rival, France.
B: The assassination of Archduke Franz Ferdinand and his wife, Sophie, of Austria Hungary.
C: Kaiser Wilhelm II of Germany forced Otto von Bismark to retire.

How did the united states respond when north vietnam attacked a us warship and sent troops to south vietnam in the early 1960s? a. the united states declined to assist south vietnam against the north. b. us leaders authorized south vietnam to invade north vietnam. c. the president did not sign the gulf of tonkin resolution. d. congress authorized the president to escalate the conflict.