Buscarel made multiple other trips back and forth between the Ilkhanate and Europe, acting as an ambassador for various Mongol rulers in turn. He represented Ghazan in 1303, carrying a message which reiterated Hulagu's promise that the Mongols would give Jerusalem to the Franks in exchange for help against the Muslim Mamluks. In 1303, the Mongols did attempt to invade Syria in great strength (about 80,000 troops), but were defeated at Homs on March 30, 1303, and at the decisive Battle of Shaqhab, south of Damascus, on April 21, 1303. It is considered to be the last major Mongol invasion of Syria.