Analysts say the upsurge in killings indicates an "undeclared war" between police and a criminal faction.

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Uncle Sam has been waging an undeclared war on seniors for the past decade.

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In 1982, after Argentina invaded the islands, it fought -- and lost -- a two-month undeclared war with Britain.

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Congress adopted the War Powers Resolution (1973) in the aftermath of the undeclared Vietnam War.

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There was more to this than undeclared wars, but that the legitimacy of each war was questioned and became a contentious political issue certainly is rooted in the failure to follow constitutional pathways.

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