Why were military leaders able to institute the roman empire?

How did the beliefs of the roman catholics differ from the eastern orthodox form of christianity?

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.

Which kind of map you would be used to show population density in the countries of the world