 However, the eastern quarter of Germany "was" later annexed and its German inhabitants expelled).With the Western Allies eventually becoming concerned about the deteriorating economic situation in their "Trizone"; the US Marshall Plan of economic aid to Europe was extended also to Western Germany in 1948 and a currency reform, which had been prohibited under the occupation directive JCS 1067, introduced the Deutsche Mark and halted rampant inflation.The Ruhr Agreement was imposed on the Germans as a condition for permitting them to establish the Federal Republic of Germany.