Obama says sending more troops to Syria reflects the "success" of his plan.

Curiously, Obama's often repeated plan was not more boots on the ground, but rather "No Boots on the Ground".

The US is to send an additional 250 troops to Syria, significantly expanding its military presence in the country in an effort to increase the pressure on Isis.

Announcing the deployment on Monday, President Barack Obama said the troops would help local forces fighting the militant group in its Syria strongholds. The decision will increase the number of US personnel in Syria to 300.

Mr Obama said the decision reflected the "success" of the 50-strong special operations force deployed to Syria in October to train and assist US-backed groups.