Answer: The Janissaries made significant contributions to many important Ottoman victories, among them the conquest of Constantinople in the spring of 1453, the battle against the Iranian Safavids at Chaldiran in 1514, and the defeat of the Mamluk armies at Marj Dabik in 1516.
Hi Lupe720!
It's useful for historians to base certain studies on the analysis of historical periods is because similar events often take place on different places during the same periods.
Hope this helps! :)
D.All of the above....................
The answer is B, nationalism. If you need an explanation just comment ʕʘ‿ʘʔ