The Welshmen will play an international against Germany, as well as against the British Army in Germany team.
The party travels to Germany for games which take place on October 19 and 22, and will be based in Paderborn for the duration of their stay.
North Wales players will be selected and added to the group in due course, with the final 22-man squad for the tour announced on October 3.
WALES DRAGONHEARTS INITIAL 26-MAN TRAINING SQUAD:
Tom Ansen, Kieran Hooper (both Bridgend Blue Bulls), Bradley Williams (Cardiff City RL), Tom Morgan (Cardiff Met University), Louis Ford, Ben Swift (both Swansea University), Sam Baker, Matthew Cummins, Mike Edwards, Louis Pengelly (all Torfaen Tigers), Ethan Coombes, Rhys Davies, Scott Giles, Dean Higgs, Mike Hurley, Craig Lewis, Jamie Marsh, Yousif Sulliman, Liam Watton (all Valley Cougars), Harry Boots, Matthew Davies, Curtis Ford, Morgan Jefferies, Aaron Lewis, Daf Philips, Josh Taylor (all West Wales Raiders)