The Noble and Puissant Order of the Warrior’s Sons are known as the Swords for the sword they bear on their shields. They were an ancient military order largely drawn from the elite of society, household knights, younger sons of lords, and even a few lords. The swords were the High Septons own personal army. They were brutally supressed by King Maegor the Cruel because of their involvement in the rebellions following Aegon the Conquerors death. Afterwards, Jaehaerys the Conciliator pardoned all those who remained, and brought the order to its end.
Information about The Warrior’s Sons that reveals spoilers from the books.