It said unrestricted submarine warfare would begin immediately.

VOA: special.2010.10.14

For instance, in 1999, two senior Chinese colonels wrote an officially sanctioned book entitled Unrestricted Warfare.

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And Communist China is operationalizing its ability to engage in what its military planners have described as "unrestricted warfare" - a strategy for using every instrument of power, from traditional and unconventional weaponry to financial attacks and terrorism - to decisively defeat the United States.

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In 1917, Germany announced it was instituting a policy of unrestricted submarine warfare.

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