The Summertide Assaults were a series of large battles between the Scarlet Crusade and the Scourge, which took place around the Scarlet Monastery in Tirisfal Glades.

According to the "Compendium of Fallen Heroes", a book located inside Acherus: The Ebon Hold, the First and Second Summertide Assaults were led by a human necromancer named Diodor the Damned, who led Scourge forces to victory, before he was finally killed at the third (and last) confrontation.

One of the many casualties of the First Summertide Assault was Ferren Marcus, High Abbot of the Scarlet Monastery.