Solution is simple like it has always been. In times of war: pick the weakest country: bomb it, plunder it, rob its people. Leave it. And all countries can work on their next plan for the next 'war'. Weak I mean wealth/army ratio. Its just about the money like it always has been.
and WWII?
Exact same story. Started with an strong combined attack on weak Poland by USSR and the third reich. After they plotted a plan togheter they they plundered it, and robbed the Polish people. After that an attack on weak Holland and Belgium. No chance, easily robbed and defeated. After the third reich had too many enemies and they were heavily outnumbered America joined to defeat the helpless third reich togheter with the USSR and England to bomb it, rob it, rob its people (contract of paying USA back because the third reich 'started' the war). Germany defeated. Hmm middle east next, same story different place+time. North korea already happened before and will likely start again. There is always the same pattern. Last pure country that supports communism. Small, isolated. Lets bomb it. Lets invade it. Lets rob it. Lets rob its people. Leave it. Clear and simple.