The first historical monarch of the name in Westerosi history was King Aegon I Targaryen, widely celebrated as Aegon the Conqueror. Alongside his sister-wives Visenya and Rhaenys, he utilized three massive dragons—Balerion, Vhagar, and Meraxes—to launch a legendary military campaign that successfully united six of the independent Seven Kingdoms under House Targaryen rule, establishing the Iron Throne and founding a dynasty that endured for nearly three centuries.