Many strongholds remained unconquered and permanently engaged large Byzantine forces. Lusius Quietus, was the son of a Christian tribal lord from unconquered Mauretania (modern Morocco). Qi was the final unconquered warring state. Hesiod uses it in the sense of "indifferent" (', "unconquered and untroubled"). For Waugh, India would remain unconquered territory. Invicta is a Latin word meaning undefeated or unconquered. Early on, the fledgling aircraft design received the name "Ajeet", Sanskrit for "Invincible" or "Unconquered". In 1692-3, Moulay Ismail organised a very large expedition against the last unconquered tribes. Alamut fell in December 1256 and Lambsar fell in 1257, with Gerdkuh remaining unconquered. It was supposed to be a fortified border to the unconquered territories. Alexander did not continue, thus leaving all the headwaters of the Indus River unconquered. He remained Governor of the unconquered part of South Carolina. Two months later, on November 19, with Stalingrad still unconquered, Operation Uranus was launched. He was able to take refuge within the city which remained unconquered. He was soon interested in mountaineering and decided to attempt the yet unconquered Matterhorn.