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Roger, the Vietnam war, which didn't involve Britain, saw a few million dead Vietnamese, many of them civilians.
In Afghanistan, British soldiers were not officially sent into a war, nor were any other soldiers, as the mission was supposed to be to rebuild and develop infrastructure in Afghanistan, and to train an Afghan army and police force.
At first, there were no more than 5,000 American soldiers, 10 years ago, and smaller contingents from other countries.
It gradually evolved into a war as the Taliban gathered strength, and the numbers of soldiers from other countries, including Britain, in Afghanistan, increased ten-fold..
Many operations carried out by British soldiers in A. are called "interacting with the civilian population", just to show their presence.
The MoD haven't got a clue what our soldiers are actually supposed to do there, apart from training the Afghan army and police (10 years on....)