Washington, June 7.- Dispatchea received from Comniander Thomas of the United States steamship Benning! ton at La Libertad, Salvador, state that he has found it necessary to land a forcé froin his vessel. He reports that the conimanders of the Salvadorean soldiery have left the town and that a state of anarchy prevails. There are few, if any. Americana ontside of the consulate in La Libertad, but Commander Thomas will protect not only these, but also care for British and other foreign residents until order is restored in pursuance of the understanding which for a long time has xisted between the United States and British naval cominanders in Central and South. American ports.