Iron Crown: The Invincible Rome from 1449

The Ironman mode in EU4 with 10,000 hours of gameplay is extremely difficult. Players start in Byzantium 1449. Disable console, disable SL, enable physical travel. Question: How can the Ottoman Empire be annexed without opening the diplomatic interface? Answer: Just reduce their morale bar to 0. [Hint: This is a story about crushing the entire Middle Ages with sheer force, without relying on intrigue or luck.]