With the advent of the war in 1939, and the subsequent enforced limitations on travel it became almost impossible for organised competitions to be played in the North Derry Area. Consequently the players who had formed the team at the clubs inception in 1933, became inactive due to lack of competitive games.

In 1941 Alfie Devine, brought together a new generation of young players consisting and played some challenge matches with neighbouring teams.

In the early 1940's, at which time games in Derry City were re-organised following the purchase of Celtic Park by the City GAA Board, this team took part in championship and league fixtures under jurisdiction of the city Board and continued to do so up until 1945. From 1946, with travel restrictions now eased, the club competed no North Derry again with the Park players (whose club was no inactive) to strengthen them, the team had a few very successful years on the playing fields.

It was not until the late 40's that minor football competitions were organised within the county, and because of this, there were no young replacements coming onto the teams regularly and consequently here were times when Claudy, like most rural clubs, had difficulty fielding a team.

The position was rectified by the formation of minor and juvenile competitions and from the late 40's onwards most clubs found little difficulty in at least fielding the required number of players.

It was during the 40's also that sports meetings and draws were held by the Claudy club funding for the purchase of playing fields launched.