On 17 September, a joint British – French – Israeli attack took place which cost the lives of 15 Russian soldiers. Following this, Moscow and Washington agreed to do the following:
 take occupational forces (of France, Turkey, USA) out of Syria;
 eliminate the jihadists; and
 put an end to the war.

James Jeffrey, the US ambassador for Syria, has indicated that the decision of President Trump to maintain a military presence in Syria is not compatible with the withdrawal of the US occupational forces requested by Syria [1].

Explanation: additional Arab or Kurdish troops and the US Air Force could continue the work currently being carried out by the US.

The US would stop acting in Syria when:
 Iran and the forces associated with it such as the Hezbollah have left Syria;
 All germs of Daesh have been totally wiped out;
 The United Nations has launched the process for political regularization.

Currently the Hezbollah has complex relations with Iran. Some experts think that the US sanctions against the Lebanese resistance are actually targetted at pushing the Hezbollah into the hands of Teheran. However, the trend of the Hezbollah has been to distance itself from Iran.

Today, the US intervention in Syria appears to be solely motivated by Washington’s desire to be associated with the future of the country, rather than leaving the field free to Russia alone.