Last Wednesday, the 13th, was the 168th anniversary of an event that should, but probably will not, serve as a not so gentle reminder to both the US and the UK that Afghanistan is a place where empires go to die.
On the 6th of January 1842 roughly 4500 British soldiers and around 12,000 of their camp followers left Kabul with the intent of retreating to Hindustan. On 13 January, seven days later, one man, an Irish Doctor by the name of William Brydon arrived in Jalahalabad. No other survivors were ever recorded.
Perhaps we shall learn but I suspect we will not.