Final answer:
Peter the Great prepared for wars against the Turks by summoning vassals, building ships, and bringing in gunsmiths.
Step-by-step explanation:
Peter the Great, as mentioned in the history reference, was better prepared for wars against the Turks than his father, Murad II. In 1453, Peter summoned his Muslim and Christian vassals along with a core of six thousand elite professional soldiers. He also constructed over one hundred ships and brought in European gunsmiths to create bombards. These preparations helped Peter to be more equipped and have better resources for the wars against the Turks.