Quotes from the article:
A drone fitted with a camera and two US Apaches flew to the patrol base, which was a compound with mud walls, bought from a local owner some weeks before and not on official maps.
Winter said the mistaken view that the British base was an insurgents' compound was shared with key personnel.
In his opening statement, Winter said throughout the incident the US Apache helicopter crews were not informed, nor did they ask for the exact location of Patrol Base Almas.
He said: "As a consequence, they were unaware that the compound they were observing and in which they believed they had positively identified insurgents was, in fact, Patrol Base Almas."
He described how, with "total disorientation" now in place, the Apaches were authorised to engage.
"Fused by the overwhelming belief that Patrol Base Almas was at risk of being overrun, the subsequent reactions and actions to these events created a devastating cumulative effect," he said.
Winter said that because of the involvement of the US Apache helicopters, the number of personnel and the different locations, the sequence of events that unfolded was highly complex.
As a result, he said he would consider all that was visible in the context of the fact that the base was not on the map.
And could someone, the OP or a Mod, edit the thread title to reflect the fact that this incident occurred DECEMBER 2009, and
not recently (as was my impression until I opened & read the link)?