Premise: Gálveztown was the HMS "West Florida", which the Continental Navy schooner USS "Morris" captured at the Battle of Lake Pontchartrain, which was then in the British province of West Florida. "West Florida" became the Gálveztown, supposedly under the command of Bernardo de Gálvez, the Spanish governor of Louisiana (New Spain).
Hypothesis: Louisiana was captured at the Battle of Lake Pontchartrain.