 He improved Mobile's defenses in 1708, but the outpost was never attacked; a village of Mobile Indians was attacked in May 1709, however.A French force from Mobile captured Pensacola from the Spanish in 1719, during the War of the Quadruple Alliance, but it was returned to Spain after the war.The location of Fort San Carlos de Austria is now occupied by Fort Barrancas, a National Historic Landmark whose construction began late in the 18th century.