Checkpoint What caused some African states to grow?

The slave trade gave some states the resources to expand and conquer their neighbors. What caused some African states to grow? They used force and diplomacy to establish coastal trading posts, which they turned into a trading empire.

Explanation:

battle of saint-mihiel, (12–16 september 1918), allied victory and the first u.s.-led offensive in world war i. the allied attack against the saint-mihiel salient provided the americans with an opportunity to use their forces on the western front en masse.

explanation:

russia because it is the biggest state