The British Army fought a bloody campaign to get some control over Sangin, a town in Helmand, Afghanistan. I have yet to find someone able to explain the particular importance of that town.
Against a lot of resistance they build a couple of bases there to control a few hundred meters of their surroundings. From a pure low-level tactical military standpoint, that was the right thing to do.
Responsibility for Helmand change in late 2010 when the U.S. Marines took over that province. They gave up on many of those bases the British had fought for at a high price of Afghan and British blood. Wrote the Telegraph:
British military sources criticised the Americans, saying they were abandoning parts of Sangin where the locals had been won over. The move would also allow the Taliban to lay more explosive devices along Route 611, the main trade artery in Sangin.
…
“They are trying a new approach but it was one tried by us in the past and led to troops being tied to just the outskirts of town and gave the Taliban the chance to plant IEDs virtually wherever they wanted.”
Well, guess what happened. The Marines took three month to recognize their arrogant mistake and took another month of bloody and very destructive fighting to reoccupy some of the former British bases.
Please try to watch this BBC Panorama report on that brutal campaign through the eye of the Afghan people living and dying there.