342 Squadron was formed on 7 April 1943 at RAF West Raynham with personnel from the Free French Air Forces (Forces aériennes françaises libres) transferred from the Middle East, in particular the personnel of the French escadrilles "Metz" and "Nancy".

[1] The squadron flew low-level bombing and strafing missions (nicknamed "hedgehopping"), over France and the Netherlands, in particular against V-1 bases in Northern France and selected sites connected with the preparation for the Allied invasion.

In October 1944 the squadron relocated to France from where it continued to support the Allied advance.

In March/April 1945 the Bostons were replaced by North American B-25 Mitchells and the squadron relocated to the Netherlands.

The squadron was transferred from RAF control to the French Air Force ( Armée de l'Air ) on 2 December 1945.