1066 and All That, by W.C. Sellar and R.J. Yeatman, illustrated by John Reynolds, E.P. Dutton, 1931.
In England, I was dreadful at History. English History started with the Early Stone Age, and went on from there, so the American Revolution (or Rebellion) was a mere tiff, a trifle. As an American, it was hard to recast my mind.
Also, this from the book, helps explain my confusion: "The Scots (originally Irish, but by now the Scotch) were at this time inhabiting Ireland, having driven the Irish (Picts) out of Scotland; with the Picts (originally Scots) were now Irish..." While this is humorously written, it is also true.
I can't say this book helps me keep my British History straight, but it does make me feel better about being so dreadful at it.