Dulce et decorum est

Amidst all the pomp and ceremony surrounding the commemoration of victims of combat during the First World War, spare a thought for the 306 British soldiers who died at the hands of their comrades, executed for "cowardice" - many of whom were underage or suffering the effects of shellshock - and the conscientious objectors who themselves showed bravery in maintaining the courage of their convictions.

(Thanks to Dave for the first link.)