He participated in the Crimean (1687, 1689) and Azov campaigns (1695–1696) of Peter the Great against the Ottoman Empire during the Russo-Turkish War. During the Great Northern War Bruce was appointed major-general of artillery. He was involved in the revival of Russian artillery, which had been lost to the Swedish forces along with its commander, Prince Alexander of Imereti at Narva in 1700. He was commander of artillery in the Battle of Poltava (1709), for which he was made a knight of the Order of St Andrew. In 1721, he became one of the first Russian counts.