A war exclusion clause or hostile acts exclusion is a common clause in insurance policies which excludes damage arising from a warlike act between sovereign or quasi-sovereign entities.[1][2][3] Insurance companies typically won't cover damages caused by war because such an event could cause damage that would be likely to bankrupt them if they had to cover it.
Companies and individuals faced with a significant risk of war, such as companies located in politically unstable countries, may be able to purchase a separate war risk insurance policy.[5]
In the US, the Terrorism Risk Insurance Act provides a "backstop" for insurance claims related to acts of terrorism.
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was invoked but never defined (see the help page).