Unlike the troops at Dunkirk or naval forces at sea, relatively few members of the French Air Force had the means or opportunity to escape. Like all military personnel trapped on the mainland, they were functionally subject to the Pétain government: "French authorities made it clear that those who acted on their own initiative would be classed as deserters, and guards were placed to thwart efforts to get on board ships." In the summer of 1940, around a dozen pilots made it to England and volunteered for the RAF to help fight the Luftwaffe. Many more, however, made their way through long and circuitous routes to French territories overseas, eventually regrouping as the Free French Air Force.