Battle Description

The Battle of Baton Rouge was part of Spain’s Gulf Coast campaign during the American Revolutionary War. After Spain declared war on Britain in 1779, Louisiana Governor Bernardo de Gálvez launched a bold offensive to seize British outposts along the Mississippi River. Following the capture of Fort Bute, Gálvez advanced with over 1,400 troops—including Spanish regulars, free Black and mixed-race militia, Native allies, and American volunteers—toward the well-fortified British position at Baton Rouge.

From September 12 to 21, Gálvez laid siege to Fort New Richmond, defended by over 500 British regulars, Loyalist militia, and German troops from the Waldeck Regiment. After a sustained artillery bombardment and trench warfare, the British surrendered on September 21. The terms of surrender also included the capitulation of the British post at Fort Panmure in Natchez.

Outcome

• Outcome: Spanish victory; British garrison surrendered.
• Casualties:
  • Spanish: ~9 killed, ~39 wounded
  • British: ~4 killed, ~2 wounded, ~375 captured

Significance on the Revolution

The victory at Baton Rouge effectively ended British control of the lower Mississippi River and secured Spain’s hold on West Florida. It also cut off British supply lines to Native allies and Loyalist forces in the interior. Gálvez’s campaign supported the American cause by diverting British resources and demonstrated Spain’s growing role in the broader conflict. His success laid the groundwork for future operations against Mobile and Pensacola, further weakening British influence in the Gulf region.