Which constitutional amendment guarantees that all citizens receive equal protection under the law?

The 14th Amendment to the U.S. Constitution, ratified in 1868, granted citizenship to all persons born or naturalized in the United States—including former enslaved people—and guaranteed all citizens “equal protection of the laws.”

Explanation:

the conditions that made the byzantine empire vulnerable to attacks by the muslin turks were the sack of constantinople by western crusaders, the conquests of the sultanate of rum, presence of rival kingdoms and finally the set up of fiefdoms at the empire which were owned by the ghazis (turkish warriors).

a historian is attempting to study how the puritans affected society in new england