When Russia first got involved in Syria, a few points came in my mind:
- To distract the international community from Crimean annexation.
- To secure a naval base in Syria so that they can get involve in Middle Eastern politics to challenge West's unmatched connection with oil rich countries.
- To test newly developed weapons.
But, I am actually confused as the Syrian expedition costed him a lot of money and the outcome is not obvious. Are all of these points or any subset of them true?
As of 2018, why did Putin get involved in Syria?
Note. The linked question and answers do not fulfill my requirement. The question was asked in 2015, which falls short of later proceedings in Syria. Answers are all devoid of any substance, and do not add anything new to our knowledge base.