What was the main source of conflict between the united states and mexico before the mexican war?

What former head of the cuban secret service was charged with protecting the country's prime minister for nearly 50 years?

Why did the crew of the zong ship throw some captive africans overboard? a. there was not enough space in the ship. b. the captives’ deaths were covered by insurance. c. the ship did not have adequate food. d. the ship did not have sufficient crew to care for the sick captives. e. the african captives rebelled against the crew.

The mongols were descendants of a. pastoral nomadic tribes b. tibetan tribes c. shang nobility