Help me with this, please

Americans who supported manifest destiny believed that the united states should

What change took place in the african slave trade in the 1500's?

What was one important characteristic of the russian military during world war i? a. it had more advanced military technology than its western european allies. b. it was an all-volunteer military that enjoyed high morale throughout the war. c. it defended russian territory but refused to attack german positions d. it was unable to provide its forces with adequate weapons and supplies.