Fort Haldane is located near Port Maria in the parish of St Mary, Jamaica and was erected in 1759.

Morgan had realized the strategic military advantage of the land and used it as an observation outpost more than 150 years prior to the construction of the fort.

By 1780, the threat of Spanish attack on the North Coast of the island had largely waned, and the decision was made to abandon the fort and relocate the garrison to nearby Ocho Rios.

As a highly decorated veteran of many major field battles, Haldane was an expert in artillery and ballistics.

[6] Robin's applied his scientific approach to ballistics, and determined that the entire port could be successfully defended by the use of two high-accuracy cannons placed 1,000 ft above sea level.