<P> The Ottoman Empire used Janissaries in all its major campaigns, including the 1453 capture of Constantinople, the defeat of the Egyptian Mamluks and wars against Hungary and Austria . Janissary troops were always led to the battle by the Sultan himself, and always had a share of the loot . The Janissary corps was the only infantry division of the Ottoman army . In battle the Janissaries' main mission was to protect the Sultan, using cannon and smaller firearms, and holding the centre of the army against enemy attack during the strategic fake forfeit of Turkish cavalry . The Janissary corps also included smaller expert teams: explosive experts, engineers and technicians, sharpshooters (with arrow and rifle) and sappers who dug tunnels under fortresses, etc . </P> <Ul> <Li> <P> Janissaries battling the Knights Hospitaller during the Siege of Rhodes in 1522 . </P> </Li> <Li> <P> Battle of Mohács, 1526 . </P> </Li> <Li> <P> A Janissary, a pasha and cannon batteries at the Siege of Esztergom in 1543 . </P> </Li> <Li> <P> Sultan Murad III's expedition to Revan . </P> </Li> </Ul> <Li> <P> Janissaries battling the Knights Hospitaller during the Siege of Rhodes in 1522 . </P> </Li> <P> Janissaries battling the Knights Hospitaller during the Siege of Rhodes in 1522 . </P>

Who were the janissaries and what religion did they follow