The opening titles to this short feature would make you think you were about to watch "Gladiator". They have a choral grandiosity to them that takes too long to get us to Marcoing in France in 1918. It's the trenches at their worst as soldiers rush through the mud amidst bullets and bombs. Then two of them - one British and one German - find themselves in a crater. There's a tussle and the former stabs the latter, but not fatally. As the battle rages around them the intensity of their situation and the predicament of the noisily injured man, slowly sinking into the fetid water at the base of…