Fort Haldane was built in 1759 to protect the strategic harbour of Port Maria from Spanish raids. It was also used as a garrison to keep the enslaved and working classes of St. Mary under control. It was named after General George Haldane, then Governor of Jamaica. The fort’s cannons were strategically positioned on a hill facing seaward over Port Maria for protection. Fort Haldane served a pivotal role in the famous Tacky's rebellion, one of Jamaica's bloodiest rebellions against slavery in 1760. On Easter Sunday, a runaway slave known as Tacky and a small group of slaves from neighboring plantations murdered their masters and marched to Port Maria where they killed the guards at Fort Haldane and stole several barrels of gun powder and firearms. They fought alongside hundreds of other slaves and Maroons for five months but their rebellion was ultimately quashed by the far more powerful British and the death of Tacky in a fierce gunbattle.