Rudyard Kipling

«Epitaphs of the War». 1914-1918. 19. The Sleepy Sentinel

Faithless the watch that I kept: now I have none to keep.
I was slain because I slept: now I am slain I sleep.
Let no man reproach me again, whatever watch is unkept—	
I sleep because I am slain. They slew me because I slept.