Carl Gustav Rehnskiöld was a Swedish general born in 1660, known for his significant role in the Great Northern War. He served under King Charles XII and was instrumental in several key battles, including the Battle of Narva in 1700. His military strategies and leadership contributed to Sweden's early successes during the war. Rehnskiöld's career was marked by his promotion to field marshal in 1710. He played a crucial role in the Battle of Poltava in 1709, where Swedish forces faced a decisive defeat. After the war, he continued to serve in various military capacities until his death in 1722.