He took valuable territory in Mesopotamia and Egypt, thus securing control over the western parts of the Asian trade both over land and over sea. He also defeated the King of Hungary and laid siege to Vienna in 1526, and he turned the Ottomans into a huge naval power. Also, judging from his hat, he had the largest brain in human history. The Ottomans basically controlled about half of what the Romans controlled, but it was much more valuable because of all that Indian Ocean trade you remember from last week. So all this land brought a lot of wealth, but it needed to be ruled. The Ottomans could have followed the Roman model, where you send out generals and nobles to rule over conquered territories, or they could have demanded the allegiance of client kings like the Persians, or developed a civil service system like the Chinese. But instead, they created an entirely new ruling class, a system that some historians call the slave aristocracy.