 Complete the following phrase:  Orwell served on the Aragon front for 115 days. It was not until the end of April 1937 that he was granted leave and was able to see his wife Eileen in Barcelona again. Eileen wrote on 1 May that she found him, a little lousy, dark brown, and looking really very well. At this point he was convinced that he would have the chance to see more action if he joined the International Brigades and fought with them on the Madrid front; his attitude was still one of exasperation in the face of the rivalries between the various factions. This changed dramatically in the first week of May when he found himself and his comrades under fire not from the Nationalist enemy but from their left-wing allies in the fighting that followed 