In the spring of 1938 the unit was sent to the Levante front to reinforce the republican forces resisting the nationalist offensive. On April 27, it reached the Levante and was sent to the battle front; the 70th MB defended La Iglesuela del Cid (May 12) and Alfondeguilla (June 4). Later it returned to the Central front, being assigned again to the 14th Division. Between January 7 and 15, 1939, it participated in a small offensive on the Madrid Front that sought to alleviate the situation of the republican forces in Catalonia, but the offensive ended in failure.