The Duc du Maine was a cargo slave ship 101.71 feet (31 metres) long and 29.86 feet (9.1 metres) wide which brought the first African slaves to Louisiana

Louisiana

Louisiana is a state located in the southern region of the United States of America. Its capital is Baton Rouge and largest city is New Orleans. Louisiana is the only state in the U.S. with political subdivisions termed parishes, which are local governments equivalent to counties...

 on June 6, 1719 from Senegambia. The ship could carry 500 to 600 slaves. After three months at sea, the first landing occurred at Dauphin Island

Dauphin Island, Alabama

Dauphin Island is a town in Mobile County, Alabama , on a barrier island also named Dauphin Island , at the Gulf of Mexico. The population was 1,371 at the 2000 census. The town is included in the Mobile metropolitan statistical area...

 with 250 slaves. The second shipment contained 349 slaves in March, 1721.