Ottoman Sultan Mehmed the Conqueror got his name for this feat.
Reclaiming Jerusalem
Capturing Constantinople
Black Sea Naval victory
Invading Romania
Occupying Egypt
Capturing Constantinople. The last remaining bastion of the Christian Byzantine Empire, Constantinople was a daunting challenge. Mehmed offered Hungary and Venice favorable peace terms to keep them out of the fight. He had created the biggest gun ever seen up to that time. After a siege of 54 days, the fortress city surrendered.