In 2392 (on stardate 69259.56) a combined Nausicaan/Gorn fleet attacked the world; the Gorn made it to the planet. Ja'rod was on Ogat at the time but survived the battle. After two weeks, the empire pushes the enemy fleet out of the star system.
The position of Governor of Ogat was tied to one of the seats on the Klingon High Council. Kurn's seat on the Council gave him this post from his appointment in 2368 to 2372, when Chancellor Gowron stripped the House of Mogh of its lands and titles.