Oh, I say !

Ive noticed a rather wry or crass sense of humour that creeps into war. Maybe its a defence mechanism, maybe its designed to boost moral ? Writing slogans on bombs is a relatively new idea, but I came across a chilling and sarcastic example of this humour while watching a series about the World Wars. One of the first prototype tanks to be used in anger in WW1 had painted on its side in gay bold happy letters
 " Oh, I Say ! "  I guess it was a slight understatement of what the German soldiers might have been thinking or saying as they saw this machine advancing towards their lines for the first time. I guess humour was as precious as gold in this terrible field of war, maybe it was all men had left ?