On the Murder March with ISIS: Terror Expert Tells of the Slave Markets, Summary Executions and 'Morality' Police of the Jihadi Group - Who Have $2trillion in the Bank

MAIL ON SUNDAY: The terror group started off as a version of Al Qaeda but split off by 2011 / Only came to forefront in 2014 when they took control of three Iraqi cities / Now boast about 33,000 fighters, many having joined from overseas / Here, Michael Burleigh takes a closer look at this medieval death cult

It is a force the like of which the world has never seen before: a medieval death cult with a territory roughly the size of England.

Its tentacles of power stretch out across Iraq and Syria, whose border it has erased. Syrian Raqqa is the de facto capital, Iraqi Mosul its most populous centre. Within its brutal control lies a huge population of eight million – and it has assets estimated at $2 trillion.

This is the Islamic State, sometimes called ISIS, a terrorist movement with the destructive power of an army possessed by a terrifying vision of the world to come. Read on and comment » | Michael Burleigh for the Mail On Sunday | Sunday, November 21, 2015