[3] At the end of August 1918, after having been equipped with Handley Page O/400 twin-engined bombers, it joined the Independent Air Force in France.

Its most successful raid was made against Morhange airfield when five O/400s, making double trips, dropped 6+1⁄2 tons of bombs on their objective.

[5] The squadron returned to England on 4 March 1919 and disbanded on 18 October 1919 at RAF Ford Junction.

[6] It was now one of only two units to operate -temporarily- the Fairey Hendon monoplane bomber, but these were soon replaced by their intended equipment, the Handley Page Harrow.

In April 1940, while flying Wellingtons (and while on temporary loan to RAF Coastal Command) it gained the distinction of making the RAF's first bombing raid of the war on a mainland target - the enemy-held Norwegian airfield of Stavanger Airport, Sola.

Sixteen months later, in August 1941, it undertook the initial Service trials of Gee, the first of the great radar navigational and bombing aids.

As a result of its subsequent report on these trials Gee was put into large-scale production for RAF Bomber Command.

[8] The memoirs of Sydney Percival Smith, a Royal Canadian Air Force Wellington pilot, contain detailed personal descriptions of 115 Squadron missions in late 1942 from its base in RAF East Wretham.

These were directed at targets in Germany (including Bremen, Stuttgart, Frankfurt and Munich) and Italy (Turin), as well as mine laying in French ports (Le Havre, Brest, St. Nazaire, and Lorient) and the Bay of Biscay.

It was now a Radar Calibration unit operating Vickers Varsitys, Valettas and briefly the Handley Page Hastings.

Armstrong Whitworth Argosies began arriving in February 1968 and when the last Varsity was retired in August 1970, the unit was solely equipped with this type.