The ILP contingent was attached to the POUM’s English-speaking contingent, as part of the centuria commanded by Georges Kopp. Once at the front, the initial group of twenty-five was sent to the front at Monte Oscuro, within sight of Zaragoza, some 12 miles to the south west, where they joined by a number of others who had arrived at the front a few weeks earlier, including Eric Blair, not yet using his pen name George Orwell; an Australian, Harvey Buttonshaw; US Revolutionary Workers League member Wolf Kupinski; and Bob Williams, a Welshman married to a Spanish woman who joined up with his brother-in-law, Ramon. With these, and other, additions the ILP contingent numbered somewhere between thirty and thirty-five. They left the front, with the POUM militia, in mid-February 1937 to take part in the siege of Huesca, some 50 miles away.