On H R Stuffnshit's blog is some thoughts on the Onion. Actually one of the most popular marching songs of the army of Napoleon was 'I like Onions Fried in Oil'. It flew in the face of the official patriotic songs they were supposed to sing. Sometimes when the army was called on to shout 'Vive L'Empereur' the troops shouted 'Vive le Pomme de terre' instead.