The Ironclad Prophecy by Pat Kelleher
It has been three months since the 13th Battalion of the Pennine Fusiliers vanished from the WW1 battlefield of the Somme and found themselves stranded on an alien world. Since then, their trenches have become the target for vengeful alien attacks. The tank, Ivanhoe, is sent on the trail of Jeffries, the impostor many hold responsible for their plight. Lance Corporal 'Only' Atkins and his Black Hang Gang, along with a captured alien Khungarrii are ordered to find him.
While the encampment faces an alien threat, the Black Hand Gang discover an ancient edifice containing a secret that will tear the Battalion apart. As the Pennines fight for their lives against the mounting horrors of No Man's World, their only hopes for survival - and a way home - lie in the psychotropic fuel-addicted crew of the Ivanhoe and its increasingly insane commander!