After many years of Civil War: What is left of the Syrian Tank Force?

After many years of Civil War, how many tanks does the Syrian Armed Forces have left? Here is an assessment based on pre-war numbers combined with a study of losses from 2011 to 2018, combined with wartime deliveries from Russia during these last years.

Sources are IISS (International Institute for Strategic Studies), Sipri, Globalsecurity.org, Bellingcat, and different news sources.