Jim, it is possible to be a veteran and a liar.
I can not say that yours is, but his story is wildly unrepresentative.

Jim and Musket, I get my historical facts from the professional historians.
Where else would an intelligent person go?

There is a consensus that Britain was right to fight, and although it was a steep learning curve with some disastrous mistakes, the leadership was good.

You two, by contrast, reject the historians' version of history because you just somehow know what happened!

A bit like the fundamentalists' belief in creation.
Never mind the carefully researched facts, you just know the Truth.