The Movement for the Defense of the Land (Catalan: Moviment de Defensa de la Terra, MDT) was the united front of the socialist independentist organizations of the Catalan Countries; specially the Socialist Party of National Liberation (PSAN), Independentists of the Catalan Countries (IPC). In 1986 the movement split in two sectors: the MDT-PSAN and the MDT-IPC. In 1991 the Communist Party of the Valencians (PCV) joined the MDT.