Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. Iranian, Russian and Turkish Presidents Focus on Unity in Efforts to End Syrian War Dorian Jones ISTANBUL - The presidents of Turkey, Iran and Russia met in Ankara Monday in the latest trilateral summit to resolve the Syrian civil war. Launched in 2017 in the capital of Kazakhstan and known as the Astana peace process, summit leaders Recep Tayyip Erdogan, Hassan Rouhani and Vladimir Putin focused on cooperation, despite profound differences on the future of Idlib, the last enclave of Syrian rebels. "We are in complete agreement in aiming for a lasting political solution for Syria's political unity and territorial integrity," Erdogan said, setting the tone for the one-day gathering. Erdogan reaffirmed his commitment to target Syria's Kurdish militia, the YPG. "We will drain the terrorist swamp east of the Euphrates (in Syria) and carry our efforts in the fight against terrorism to another level," he said. Ankara designates the YPG as terrorists linked to a Kurdish insurgency inside Turkey. The YPG is a crucial ally in Washington's war against Islamic State. Last month, Turkish and U.S. generals hammered out an agreement to jointly create a buffer zone in Syria to protect Turkey's frontier from the YPG. Analysts say many details remain unresolved between the two NATO allies. Erdogan, flanked by Rouhani and Putin, reiterated his threat to unilaterally act against the U.S.-backed militia by the end of the month if a buffer zone has not been created. Rouhani attacked America's presence in Syria. "(President Donald) Trump said last year that U.S. troops will pull out of Syria, but the outcome of this promise has been like his other promise -- a lie," Rouhani said. "It is essential that U.S. troops leave the region at once, and the Syrian government establishes sovereignty in the East, north of (the) Euphrates." Putin backed a Turkish intervention, saying any country has the right to protect its border. But with the condition, any response has to end once the threat is removed, he said, reiterating Syria's sovereignty. Analysts sayRouhani, Erdogan and Putin suspect that Washington secretly harbors plans to create an independent, or at least autonomous, Kurdish state. .