Vladimir Putin will have paid very close attention to the location of the Syrian artillery battery where four Russian soldiers lost their lives at the weekend. The desert around Deir ez-Zour remains a dangerous place – politically as well as physically – in which the Americans and Russians play an extremely risky game of war.
The front line with Russia has moved east. It makes sense for American forces to follow.
http://www.rosbalt.ru/russia/2018/05/30/1707068.html
https://www.gazeta.ru/business/2018/05/29/11774113.shtml?updated
https://ru.krymr.com/a/29258852.html
https://www.radiosvoboda.org/a/29259648.html
https://ru.krymr.com/a/29259016.html
https://www.rbc.ru/newspaper/2018/05/30/5b0d288a9a79472b0a2f219d