US signals escalation in Isis fight

Militant group ‘beyond anything we’ve seen’, says defence secretary

Kurds hone battlefield skills against Isis

Jihadists’ guerrilla tactics shock peshmerga fighters

Mystery of drop into Isis military base

Raid on camp with secret prison may have been US rescue

Use Assad to defeat Isis, says Rifkind

Senior British MP warns against being ‘squeamish’ about methods

Deranged killers who pose as terrorists

The disturbed and the deluded swell the ranks of the black-clad army, writes Gautam Malkani

US attempted to free hostages in Syria

Announcement comes amid anger over Foley killing

Extreme violence lies in Isis DNA

Successor to al-Qaeda in Iraq espouses same extreme violence

Cameron tackles jihadi threat to UK

PM cuts short holiday as identifying Foley killer becomes top priority

Defeating Isis likely to take years, warn analysts

Taking on insurgents will be far harder than fighting al-Qaeda

Iraq’s elusive political consensus

Shia, Sunni and Kurds must make difficult compromises to keep the country together

Isis claims to behead US journalist

Kurds take tough line in government talks

Premier-designate Abadi races to form cabinet

Iraqi forces fail to retake Tikrit

Fighting comes as pontiff calls for UN action to stop Isis

Kurds retake Mosul dam from Isis

US air strikes pave way for morale boosting victory

Britain’s options to fight Isis

PM signals more muscular interventionist stance against Isis

New Iraq leader will fail without support

It seems political chiefs installed by the US never want to leave office

Kurdish forces encircle Mosul dam

Isis continues to make gains in Syria

Assad and rival rebels face daunting task to rein in Islamists

China’s dilemma in the Middle East

In Iraq, one of the countries at risk of losing the most is standing aside

PKK ‘terrorists’ crucial to Iraq’s Isis fight