You need a printed program to figure out what’s going on over there. This is as confusing as the breakup of Yugoslavia.
That’s an apt analogy, via Yugoslavia, but this is much more complex even than that.
As well, it is important to note that this graphic shows official diplomatic and military support rather than covert operations or unofficial military support.
Source: http://www.conflict-news.com/infographic-foreign-involvement-in-syria-and-iraq/