A guerrilla movement in Ethiopia was formed to rout out Italian forces as early as 1935. Other clandestine organizations operated in Denmark, Belgium, Norway, France (Resistance), France (Maquis), Czechoslovakia, Slovakia, Yugoslavia (Royalist Chetniks), Yugoslavia (Partisans), Soviet Union, Italy, Albania and Greece. From the second half of 1944, the total forces of the Yugoslav Partisans numbered over 500,000 men organized in four field armies, which engaged in conventional warfare. By 1944 the Polish resistance was thought to number 600,000. Many of these organizations received help from the British operated Special Operations Executive (SOE) which along with the commandos was initiated by Winston Churchill to "set Europe ablaze." The SOE was originally designated as 'Section D' of MI6 but its aid to resistance movements to start fires clashed with MI6's primary role as an intelligence-gathering agency. When Britain was under threat of invasion, SOE trained Auxiliary Units to conduct guerrilla warfare in the event of invasion. Even the Home Guard were trained in guerrilla warfare in the case of invasion of England.