Nigel Tranter - The Queen's Grace

Of course, the Roman Empire never conquered Ireland nor did they conquer Scotland. They fought a battle at Mons Graupius (Which no one to this day knows where exactly it took place.) After being raided en mass, with thousands of casualties due to guerilla raids by the Caledonians they retreated and made Hadrians' Wall and there were still terrifying night raids that took place. Look at any nation in the world and you will not find one where the original inhabitants of the state remain unconquered. The Jacobites formed an army the same size used at Culloden just weeks after the battle. There were reports of mutiny in the Highland ranks of the British military, explored in the book Mutiny by John Prebble. The very things that were nearly eradicated from this planet, including Highland Dress and Scottish Gaelic, still exist. The British Empire had to construct Fort George near Inverness to control the Highlands and create their supreme military unit The Black Watch to control the area. Scotland still has its own bank and government, and who knows maybe in the future will one day be its own fully-fledged state.