Well this ones i`ve read on VARP forum.
A long time ago, Britain and France were at war.
During one battle, the French captured a British colonel.
They took him to their headquarters, and the French general began to question him.
Finally, as an afterthought, the French general asked, "Why do you British officers all wear red coats? Don't you know the red material makes you easier targets for us to shoot at?"
In his casual, matter-of-fact, way, the officer informed the general that the reason British officers wear red coats is so that if they are wounded, the blood won't show, and the men they are leading won't panic.
And that is why, from that day forward, all French army officers wear brown trousers.
p.s. I`ve heard this about Brits having read coats before (the blood thing) plus the one that they are very recognizable on field of battle. Is anyone of those true or the truth lies somewhere else???