I ve been inspired by the Poland borders survey, so I thought of doing one about Serbia. The question is, what should have been the borders of Serbia after either WW1, or later after WW2.

What would be the optimal borders of Serbia, for long term stability, and to prevent ethnic tensions?
Violet – These territories should be actively pursued since there are indispensable to Serbia . (10p)
Blue – These territories should be actively pursued after Violet territories are secured.(8p)
Green – Territories of secondary importance, yet still worth of pursue if previous objectives are achieved. (6p)
Yellow –Maybe… These territories might be kept if offered or if opportunity to snatch them with little to no effort arises. Still, might prove to troublesome.(3p)
Red – Negatives from securing and/or keeping these territories outweigh the benefits. Keep out! (0p)