Scotland first emerges from the mists of antiquity with wild Pictish tribes raiding into England and bringing about the mysterious disappearance of the Ninth Legion. Its subsequent history consisted of brave missionaries, tribal turblence, and frequent raids into England which partly provoked and were partly in retaliation for English attempts at conquest.

One has to admire the English; they first accepted a Welsh king and thereby ensured an era of peaceful occupation of Wales, then the Welsh king (well, queen, actually) appointed a fellow Celt from Scotland as ruler of England, which meant that Scotland too became part of the United Kingdom. I might point out that both kingdoms profited enormously by the union and the subsequent peace.