A man learns that his father, an ex-president, was targetted by a Bad man.
He, now a President, selects/fabricates evidence so as to punish that Bad man (already long on his personal agenda and that of his cronies), thus enlists an entire nation and its young expendables - all while ignoring several Other Bad men.
Many people die, the Bad man's country proves a morass of irreconcilable Differences, most persisting over centuries.
Another country, a party to the plan: suffers hundreds dead and a thousand maimed. (Its people blame the pact of support for the invasion of Bad man #1, and now seek to end that support, as they ended that Government.)
Stay tuned for the denouement. Shakespeare would have been proud!