sentences:  As a result, the communists were able to dig in underground without suffering significant casualties, despite most of their fortifications above the ground being demolished by Nationalist attacks from air and sea.Despite Nationalist encouragements including a half-million-dollar incentive reward for each troop, repeated Nationalist charges against communist positions were beaten back—the communists even at one point used Nationalist corpses to improvise temporary fortifications, which proved to be a psychological shock to the attacking Nationalist troops.As a result, the Nationalists were unable to advance any further towards Jinzhou.