John Simpson: Afghanistan, its future, and why China matters – BBC News

For three thousand years, armies have struggled through these rocky defiles and camped in its valleys. You can still see the insignia of regiments from the British and British Indian armies, which continue to be carefully maintained, along the sides of the road, overlooked by the forts they once built and guarded. From the rocks above, Pashtun tribesmen armed with ancient jezails, or flintlock rifles, would snipe at passing soldiers with amazing accuracy.