At the same time, Reports emerged in Beirut that hundreds of Hizbullah fighters are also withdrawing from Syria, returning to the Dahiya district of east Beirut.
The Syrian Arab Army of Bashar al-Assad was on the verge of taking west Aleppo when the UN cessation of hostilities was implemented. That move would have resulted in a horrible slaughter and reprisals by the regime against the people of those quarters. Likewise, before the Russian intervention the possibility of an al-Qaeda conquest and massacre of the Alawites of Latakia loomed large.
So, Putin seems to have frozen the current positions. This step may be intended to put pressure on al-Assad and on the rebels as well. The Russian intervention inflated the ego of Bashar al-Assad, who recently pledged to reestablish government control throughout Syria, much to Russias annoyance.
Yesterdays announcement signals to al-Assad that he cannot act as a free rider on the Russian tab. Rather, the meeting of the sides in the war in Geneva on Monday would have to be taken more seriously by Damascus.
http://www.juancole.com/2016/03/russia-hizbullah-begin-withdrawal-from-syria.html