Why? A comparison of Syria and Iraq

Yasser on Facebook posted this:

Why is it that Syrian [regime] attempt to regain Aleppo is always described as "invasion" or "conquest" whereas Iraqi [regime] (future) attempt to regain Mosul always described as "liberation"?

http://www.independent.co.uk/…/syrian-civil-war-russia-and-…

http://www.theguardian.com/…/syrian-rebels-losing-grip-on-a…

http://www.newyorker.com/magazine/2016/01/18/the-front-lines

http://rudaw.net/english/middleeast/iraq/211220151