Ada'Soom was responsible for the sacking of Windhelm whilst in Skyrim , and only the Palace of the Kings was left undestroyed . During this battle, the Queen, Mabjaarn Flame-Hair, and her successor, Princess Nurnhilde, were killed. 
Ada'Soom is known to also have fought in Morrowind against the Tribunal. . It is said that Almalexia summoned help from the Underking in order to defeat the Akavir.  It has also been suggested that the Underking was actually Wulfharth, but this fact is disputed. . In actuality, Jorunn the Skald King helped the Tribunal, with his Nordic army, and the help of Wulfharth. . Along with Argonian shellbacks, the three races fought off the invasion at Stonehalls.