Aegon Declared war on all of the Free Cities at once citing his dragons gave him the right to conquer the daughters of Old Valyria. They all submitted to the dragon and gave the Old Andal lords lordship over Andalos again. Aegon used his new found wealth to fund massive construction projects in Westeros.
Aegon dreamed of restoring Essaria and declared war on the cities and kingdoms of Astapor, Meeren, Yunkai, Hazdahn and New Ghis. They all marched to war and the Dragon broke them like Valyria had broken the lockstep legions of Old Ghis. He peacefully integrated the lords of the Lazarareen naming Lazosh the capital and the lord of Lazosh lord paramount of the region.
Aegon had more Wealth than he could possibly imagine from the conquest of Slaver’s Bay and spent it rebuilding old Ghis, the Rhoyne, and the Ruins of north Valyria naming lords of those regions before marching off to war with the Dothraki Khals who held the lands of Essaria, Volantis and The Skahazdahn. He crowned himself Emporer of New Valyria and Ghiscar after his borders in Essos were secure.