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

<P0-S0> 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). <P0-S1>  It has been described as the first major military campaign fought entirely by air forces. <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> 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. <P2-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> <P3-S0>  They were the No. 3 OTS flying the Canso and Catalina and No. 32 OTS with Ansons, Beauforts and Swordfish at Patricia Bay. <P3-S1>  By the end of the war the command would involve some twenty squadrons when the last units to join were added in 1943. <P3-S2>  In February and March 1945, P-40 fighter pilots from 133 Squadron, Royal Canadian Air Force operating out of RCAF Patricia Bay (Victoria, British Columbia), intercepted and destroyed two fire balloons, On 21 February, Pilot Officer E. E. Maxwell While shot down a balloon, which landed on Sumas Mountain, in Washington State. <P3-S3>  When Canada declared war against Germany in September 1939 the command consisted of only five squadrons. <P3-S4> 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. <P3-S5>  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. <P3-S6>  Four of them equipped with obsolete aircraft including a bomber squadron with aircraft from the Great War and there were no fighter aircraft at all for its only fighter squadron (113 Fighter Squadron was thus disbanded). <P3-S7>  P.M.G. Thomas of No. 115 Squadron RCAF then led American Destroyers to sink the damaged submarine. <P3-S8>  Within several months almost all the flying squadrons would be completely stood down. <P3-S9>  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. <P3-S10>  During another interception a Canso forced down a fire balloon which was examined at the army headquarters. <P3-S11>  By January 1943 Western Air Command had expanded to include many bomber, fighter and operational units under its control. <P3-S12>  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. <P3-S13>  Countless training missions and operational patrols bolstered the air activity over the coastal areas but there was not much action until RCAF Western Command was on the look out for General Kusaba's Fire Balloons that the Japanese called the Fūsen Bakudan Campaign. <P3-S14>  With the Japanese threat after Pearl Harbor it grew rapidly and played a critical role in fighter and anti-submarine operations in Canadian and American waters during the Aleutian Islands Campaign.