https://www.defense.gov/Portals/1/Documents/pubs/2018-National-Defense-Strategy-Summary.pdf
Read in the context of
https://www.brookings.edu/wp-content/uploads/2017/12/future_national_defense_strategy.pdf
And compare/contrast to National Security Strategy
https://www.whitehouse.gov/wp-content/uploads/2017/12/NSS-Final-12-18-2017-0905.pdf
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