No. 107 Squadron RAF was a Royal Flying Corps bomber unit formed during the First World War. It was reformed in the Royal Air Force during the Second World War and was operational during the Cold War on Thor Intermediate Range Ballistic Missiles. History Formation and the First World War Though already formed at Catterick as a day bomber unit on 8 October 1917, No. 107 Squadron was not equipped with aircraft until 15 May 1918 at RFC Lake Down, north of Salisbury. The squadron received Airco DH.9s, which it took to the Western Front on 3 June of that year. The squadron became at first part of the 13th wing of the 3rd brigade, working up to operational status. Thereafter it was transferred to the 51st wing of the 9th brigade and it began operations from Drionville. Its main targets were enemy airfields, base areas and communication lines, which it continued to attack until the Armistice. The squadron's most successful raid was made on Saponay on 21 July 1918, where a large ammunition dump was hit. From the squadron's airfield, 20 miles away at Chailly, the reflection of the explosions and fire could be seen going on all the evening and throughout the night. Another notable raid was that made on the Aulnoye railway station and junction on 1 October 1918. Returning to Hounslow Heath Aerodrome in March 1919, it disbanded there on 30 June of that same year. Reformation and the Second World War No. 107 Squadron was reformed at RAF Andover on 10 August 1936 as a light bomber squadron, equipped with Hawker Hinds. These were replaced by Blenheim Mk.Is from August 1938 which gave way in their turn to Blenheim Mk.IVs in May 1939. It was with five of this aircraft that No. 107 took part in the RAF's first bombing raid of the war against enemy ships in the German port of Wilhelmshaven on 4 September 1939, the day after war was declared on Germany, along with No. 110 Squadron. The raid was not a success: of the five aircraft despatched only one returned – and with its bomb load still intact as it had not been able to locate the enemy. One of shoot down Blenheims (N6189), flown by F/O Herbert Lightoller, crashed into cruiser Emden, causing slight damage, killing 11 crewmen and injuring around 30. These were among the first casualties of the