February 1940 he volunteered to join the Czech army in exile in France.

Arrived in Marseille 3rd April 1940, then moved to Agde Camp on 4th April where he reported for duty under General Ingr to the Army 6./2 Squadron (Czech army under French command about 5,000 strong). Germans invaded France 10/5/40, took part in fighting alongside French Army north of Paris and then southwards 12th to 23rd June.