Battle of Mount Othrys

The Battle of Mount Othrys was the final engagement in the Roman side of the Second Olympian War, contemporaneous with the Battle of Manhattan. The Roman demigods, commanded by Jason Grace, assailed the Titan fortress of Mount Othrys, confronting an army of Scythian dracanae.

The battle was a decisive victory for the demigods. Jason claimed that he "toppled the black throne of Kronos, and destroyed the Titan Krios with my own hands". While Titans are immortal and thus can not be completely destroyed, presumably Krios's physical body was destroyed and his essence returned to Tartarus. At the end of The Last Olympian, Mount Othrys was said to have "crumbled into ruins"; at the time this was considered to be a natural effect of Kronos's defeat in Manhattan, but it was revealed in The Lost Hero that the Romans actually accomplished the feat.