Cause and effect what effect did abu bakr have on the spread of islam?

Explain how president trumans knowledge of previous historical events influenced him to initiate us involvement in korea

Historians use periodization in order to: a. decide when a certain historical even took place. b. divide history into units with distinct start and end dates. c. criticize arguments made about the past. d. organize history into different timelines

What were significant events and outcomes of the crusades?