James Giesler is a historian and military writer known for his research on early American history and the international dimensions of the American Revolutionary War. His work examines the roles played by European powers and diplomatic networks that supported the American cause against Britain. Giesler is the author of Francisco de Saavedra’s American Revolutionary War, The Spanish Contribution to the Battle of Yorktown, published in 2025, which studies the financial, logistical, and diplomatic support provided by Spanish official Francisco de Saavedra to the allied American and French forces during the Yorktown campaign.