Modern warfare is almost always multilateral to one degree or another, requiring countries to cooperate as allies or coalition partners.
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Others change tactical objectives with each new commander.
Some refuse to participate in dangerous or offensive missions.
Countries differ significantly in what they are willing to do and how and where they are willing to do it.
Yet as the war in Afghanistan has made abundantly clear, multilateral cooperation is neither straightforward nor guaranteed.
Modern warfare is almost always multilateral to one degree or another, requiring countries to cooperate as allies or coalition partners