The first ATS personnel to arrive in the theatre landed at Arromanches

The first ATS personnel to arrive in the theatre landed at ARROMANCHES on 12 August 44 with HQ 21 Army Group.

There were 400 in the party—one ATS group HQ and three companies—the auxiliaries being employed as cooks, orderlies, clerks and drivers.

See the whole story of the ATS

https://backtonormandy.org/support-troops/3626-auxiliary-territorial-service.html#tab-26-july-26-september