Although there are a number of major disagreements between Iran, Russia and Turkey, what is important in the end is that they are all opposing the current US policies in Syria. All three countries have suffered from US sanctions and all have serious trust issues with the Trump administration. Emphasising this common ground, Iran's Supreme Leader Ayatollah Ali Khamenei told Russian President Vladimir Putin earlier in September that "the US is containable" and that Iran and Russia should continue close cooperation towards this goal. Whichever strategy Iran chooses to pursue, the US will likely feel the pressure on the ground soon enough. That could end up being an effective deterrent against US plans of opening additional fronts against Iran in the Middle East.