What was the main goal of the first crusade? to the byzantine empire regain land lost to the muslims to take the holy land back from the islamic empires to take the arabian peninsula from the muslims to reunite the eastern and western roman empires

I'm pretty sure "to take the Holy Land back from the Islamic empires."

new evidence is discovered.

oversights and errors are corrected,

new technology is applied to evidence.

world war i began in 1914, after the assassination of archduke franz ferdinand, and lasted until 1918. during the conflict, germany, austria-hungary, bulgaria and the ottoman empire (the central powers) fought against great britain, france, russia, italy, romania, japan and the united states (the allied powers). to new military technologies and the horrors of trench warfare, world war i saw unprecedented levels of carnage and destruction. by the time the war was over and the allied powers claimed victory, more than 16 million people—soldiers and civilians alike—were dead.

explanation: