What Country Should We Invade Next?

We can claim that Iraq is ours since 2003 since we toppled their dictator and established a Democracy and troops are still there. Afghanistan is pretty much ours as well since we also have troops there, and just recently our Armed forces invaded Lybia. Weve been doing good so far!!! But who should we invade next??? I say Mexico since its right there and it would end our immigration problem once in for all or somewhere in the Middle East, maybe Iran? Or maybe China. What do you guys think? what country or countries should we invade next since we already have 3 under our control!!!!