Career
Expelled from the province by the Spanish authorities in a dispute over land titles, the Kemper brothers organized a small force in the Mississippi Territory and returned, declaring West Florida to be independent. They attempted to capture Baton Rouge in 1804, but were defeated, having failed to gain the support of local Anglo-American settlers, most of whom were satisfied with Spanish rule on account of Spain"s liberal land grants and its protection of slavery. The following year Spanish forces captured all three brothers while they were on United States. soil, but American forces rescued them as they were being taken down the Mississippi River.
In 1810, during the rebellion against Spanish rule by British and Anglo-American settlers (who comprised the majority of inhabitants), Reuben Kemper and Joseph White were authorized to invite the inhabitants of Mobile and Pensacola to join in the revolt.
When Kemper crossed into the Mississippi Territory, United States. forces, not wishing to provoke Spain into war and fearing Kemper"s intentions, arrested him. He was more fortunate than his colleagues, who were seized by the Spanish authorities and sent as prisoners to El Morro, in Havana, Cuba.
Nevertheless, the rebellion succeeded and the Republic of West Florida came into existence. However, it would last only 90 days before it was annexed by the United States.
In 1812-1813, Kemper took part in the Gutiérrez–Magee Expedition into Spanish Texas, fighting to help free Mexico from Spanish rule.
He also served as a colonel under Andrew Jackson at the Battle of New Orleans in January 1815. Kemper then settled down peacefully as a planter in Mississippi. He died in 1827 in Natchez, Mississippi, aged 55 or 56.
Reuben Kemper is the namesake of Kemper County, Mississippi.