 Complete the following phrase:  On the military level, along 1937 he launched a series of offensives in June Huesca  Segovia, July, Brunete and August, Belchite, in order to halt the Nationalist offensive in the North, but all failed and by October the Nationalists had occupied all of the Northern territory. Beginning December, he launched an offensive in order to free Teruel, but by February the Republican Army had to retreat after suffering heavy losses and the rebel faction launched a counter-offensive in 