The problem with the military mind is its lack of ability to see its narcissism. It can only see war as necessity to justify its oppression and brutality. Peace keeping, another term for oppression of demands for human and economic rights by the poor and undereducated, in the 21st century can be achieved without hundreds of thousands of exploited underclass citizens being amed with lethal weapons.
The military-industrial (corporate) complex needs to process these underclass men and women to control them, disable them or route them into underclass jobs after their service. If they were not controlled in this fashion, they might well form an army of revolution against the status quo.
This is the old reality behind armies and wars.
If wealth were not hoarded and passed on by the rich, there would be ample financial resources to spread peace, rather than just keep it. Schools, clean water, healthy housing and more could be afforded to the poorest of our brothers and sisters worldwide. Armies guard the rich at the expense of the poor. Armies, like the violence they perpetrate, are evil without exception.