Question: Which country was Pilot Officer Sydney "Timberoes" Carlin fighting against while serving as air gunner?

<P0-S0> Norman Francis Williams, (3 November 1914 – 30 June 2007) served as an air gunner in Royal Australian Air Force (RAAF) bombers in the Second World War, becoming its most highly decorated non-commissioned officer. <P0-S1>  A rear gunner in a Halifax bomber, he was credited with shooting down 8 German aircraft and damaging several others, making him the RAAF's only "ace" who was not a fighter pilot. <SEP> <P1-S0> Pilot Officer Sydney "Timbertoes" Carlin, {'1': ", '2': ", '3': ", '4': "} (1889–1941) was a British World War I flying ace, despite having previously lost a leg during the Battle of the Somme. <P1-S1>  He returned to the Royal Air Force in World War II, serving as an air gunner during the Battle of Britain. <SEP> <P2-S0> Western Air Command was the part of the Royal Canadian Air Force's Home War Establishment responsible for air operations on the Pacific coast of Canada during the Second World War. <P2-S1>  On 10 March, Pilot Officer J. O. Patten destroyed a balloon near Saltspring Island, British Columbia. <P2-S2>  On 7 July 1942 a Bristol Bolingbroke pressed home an attack on the Japanese Submarine Ro 32 the pilot F/Sgt. <P2-S3>  Within several months almost all the flying squadrons would be completely stood down. <P2-S4>  When Canada declared war against Germany in September 1939 the command consisted of only five squadrons. <P2-S5>  With the unconditional surrender of Japan the RCAF's Tiger Force bomber squadrons were disbanded before they flew overseas and the total draw down of the Western Air Command was suddenly undertaken. <P2-S6>  In April, 1944 the No. 5 OTS Heavy Conversion unit stood up at Boundary Bay when 16 B-24 Liberators arrived fresh from American factories. <P2-S7>  In addition to the new squadrons, new aircraft types came on line replacing the command's remaining Supermarine Stranraers and Blackburn Sharks with Canso's and the Bolingbrokes and Beauforts with the Lockheed Ventura. <P2-S8>  It was there that Squadron Leader K.A. Boomer of No. 111 Squadron shot down a Rufe fighter, the RCAF's only kill in the Pacific Theatre. <P2-S9>  By January 1943 Western Air Command had expanded to include many bomber, fighter and operational units under its control. <P2-S10>  These were the 163 Army Cooperation Squadron in March flying Bristol Bolingbrokes and Hawker Hurricanes, in May the 160 Bomber-Reconnaissance Squadron was added flying Cansos from Sea Island BC (before moving to Yarmouth NS in July) and the 166 Communication Squadron formed in September flying various types. <P2-S11>  During another interception a Canso forced down a fire balloon which was examined at the army headquarters. <P2-S12>  Patrol activity was joined by the Operational Training Schools (OTS) operated by Number 4 Training Command of the BCATP. <P2-S13>  By the end of September 1944 RCAF 5 O.T.U. had grown to sizeable force of some 87 aircraft including 38 B-24 Liberators, 35 B-25 Mitchells, 5 Bolingbrokes, 8 P-40 Kittyhawks and a single Norseman. <P2-S14>  By the end of the war the command would involve some twenty squadrons when the last units to join were added in 1943. <SEP> <P3-S0>  It has been described as the first major military campaign fought entirely by air forces. <P3-S1> The Battle of Britain (German: "Luftschlacht um England" , literally "the air battle for England") was a military campaign of the Second World War, in which the Royal Air Force (RAF) defended the United Kingdom (UK) against large-scale attacks by the German Air Force (Luftwaffe).