Sher-e-Hindustan: 

Only Osman the founder did not want to expand into Europe. 

Without exception, every other Sultan had to expand or risk the Empire too implosion. Instead the Ottoman Empire expanded through Europe, the Middle East to the north coast of continental Africa. They controlled Jerusalem, Mecca and Medina. This expansion was seen as true Holy war. 

They were brutal and efficient warriors known for their overwhelming attacks. If you know the story of John Adams and the Emissary of Istanbul, I will have to say nothing else. 

Adams and Jefferson traveled to Paris to meet the Emissary and demand the end of attacks on American maritime merchants. 

The Emissary told John Adams an outright, 'no'. The Emissary stated their Holy Book gave them permission to seize and enslave American cargo and women. 

This would give rise to new wars and a hymn, From the Halls of Montezuma, to the shores of Tripoli, we fight our country's battles, in the air, on land, and sea.