By John Irish and Andrea Shalal

MUNICH (Reuters) – The United Nations and other parties to Syrian peace efforts on Sunday softened any expectations of a major breakthrough at U.N.-led talks in Geneva next week, with U.S. policy on the crisis in disarray and its ties with Russia unclear.

U.N. envoy Staffan de Mistura told the Munich Security Conference the lack of a clear U.S. position made resolving the complex issues of the six-year civil war far more complicated than his earlier mediation efforts for Iraq and Afghanistan.

“I can’t tell you (if it will succeed), but we have to push with the momentum. Even a ceasefire cannot hold too long if there is no political (solution),” he said, referring to the shaky ceasefire brokered by Russia and Turkey in the Kazakh capital Astana.

Questions abound over Washington’s approach to ending the war, even after the first international foray by members of U.S. President Donald Trump’s foreign policy team. It remains unclear if Trump will make good his promise to build closer ties to Russia, especially in the fight against Islamic State.

“One thing I’m missing at the moment … is a clear U.S. strategy,” de Mistura told delegates. “Where are the United States (on a political solution)? I can’t tell you, because I don’t know.”

The U.N.-led intra-Syrian talks will resume in Geneva on Thursday after de Mistura broke them off almost nine months ago following several rounds that led ultimately to an escalation of violence.

President Bashar al-Assad is in his strongest position since the early days of the civil war, which began as a popular uprising in the spring of 2011 before spiralling into a war that has killed up to 400,000 combatants and civilians.

He told French media last week that he deemed all those fighting him to be terrorists, signalling that the government delegation is likely to remain steadfast in the Geneva talks.

U.S. officials have ruled out cooperating with Russia militarily until it has persuaded Damascus to take a broader view, European diplomats said last week.

De Mistura said the talks will focus on a new constitution, free and fair elections administered under supervision of the United Nations, and transparent and accountable governance.

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