Which chinese sailor began a series of seven naval expeditions that went as far as the east coast of africa?

Idon't really understand the question. it counts for 20% of my lesson grade and i really need putting the answer into words. anything will . i need asap so im awarding 30 points.a disagreement between states of the united states concerning the rights of states vs. the authority of the national government led to the civil war. state governments were forced by war into a subservient position. what might happen if national governments ceded their authority to a world government by international treaty?

Which significant event in texas history occurred in 1876?

Which two tribes were closely related allies of the wichita? a. the lions and the kiowa apache b. the kadohadacho and the pawnee c. the osage and the quapaw d. the tawakoni and the waco