How did alliances contribute to the start of World War I? a) Alliances made it easier for nations to negotiate peace treaties.
b) Because of alliances, fewer nations needed to participate in the war.
c)Alliances required nations to defend each other against aggression.
d)A set of alliances helped nations respond peacefully to problems.

Match these items. 1 . stephen douglas published "north star" 2 . frederick douglass first african slaves arrived in jamestown 3 . crittenden compromise proposed kansas-nebraska act 4 . republican party extend 36° 30' line to california 5 . abolitionists servitude in exchange for passage to the united states 6 . indentured struggle between proslavery and antislavery groups 7 . jefferson davis formed to prevent spread of slavery 8 . "bleeding kansas" wanted slavery abolished 9 . uncle tom's cabin president of confederacy 10 . 1619 harriet beecher stowe