The United States encouraged its Syrian Kurdish allies to reach Monday's landmark deal with the Islamist-led government in Damascus, six sources said, an agreement that could stave off further conflict in northern Syria at a time of uncertainty over the future of U.S. forces deployed there.

The image of the two men meeting, having discarded their military uniforms and put on suits, illustrates how leaders can seize the moment and opt for peace over war.

US forces in eastern Syria continue to work closely with the Syrian Democratic Forces (SDF) and the Syrian Free Army (SFA). However, the agreement between SDF commander Mazloum Abdi and Syrian President Ahmad al Sharaa to integrate eastern Syria into the country’s new governing institutions could affect the US role in Syria and the broader anti-Islamic State campaign.