The president has many faults and is a lousy judge of character. But he was absolutely right to read the riot act to the military brass for daring to ask for a very large troop and budget increase for the stalemated Afghan War that has cost $1 trillion to date.

Of course, the unfortunate generals are not really to blame. They have been forced by the last three presidents to fight a pointless war at the top of the world that lacks any strategy, reason or purpose – and with limited forces. But they can't admit defeat by lightly-armed Muslim tribesmen.

The truth is, simply, that America blundered into the Afghan War under President George W. Bush who needed a target for revenge after the humiliating 9/11 attacks. Instead of blaming Saudi Arabia, a US protectorate which was clearly involved in the attacks, Bush went after remote but strategic Afghanistan and cooked up the Osama bin Laden bogeyman story.