Duntroon has traditionally entered teams in rugby, AFL and soccer in canberra. In fact, Duntroon won the inaugural John I Dent Cup in the premier rugby division in Canberra in 1938.
The military blamed the decision on injuries to cadets, penalties imposed for forfeits caused by training commitments and the introduction of the Australian Defence Force Academy.
Duntroon teams struggled to field teams last year on a week-to-week basis and were forced to forfeit a number of games.
The CT has an article here