In February 1852,
Henry Watkins Allen and William Nolan purchased the Westover Plantation. Henry Watkins Allen had served as a brigadier general in the
Confederate States Army during the American Civil War, as well as serving as the 17th
Governor of Louisiana. Three years later in 1855, the land was divided and split; with Nolan keeping the name Westover Plantation on his portion of land and Allen using the name Allendale for his portion of the property. Allen owned 125 enslaved African Americans. Allen built his own railroad, which had been headquartered in what is now the town of Port Allen. Allen had moved to Mexico art the war in 1865, and a year later he died on April 22, 1866, in
Mexico City, and as a result the Allendale Plantation held many owners after his death. The Kahao family operated it as a sugar mill into the 1930s. == Architecture ==