What unite the islamic and empire as it spread under the abbasid dynasty a) the jizra b)social classes c) arabic language d) medical advancements

on april 6, 1917, the u.s. joined its allies--britain, france, and russia--to fight in world war i. under the command of major general john j. pershing, more than 2 million u.s. soldiers fought on battlefields in france.

a widespread disease that killed many people

the split of the christian church

invasion from arab muslims