The Second World War was a good example of a two-front war. Once Russia and Germany became enemies, Germany was forced to split its troops and send them to separate fronts, weakening their impact on either front. In practical life, opening a two-front war can often be a useful tactic, as can solving a two-front war or avoiding one, as in the example of an organization tamping down internal discord to focus on its competitors. – Shane Parrish
“A war in which fighting takes place on two geographically separate fronts.” – Gabriel Weinberg
Source:
Shane Parrish’s Farnam Street Mental Model Guide
https://www.farnamstreetblog.com/mental-models/
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Gabriel Weinberg’s Mental Models I Find Repeatedly Useful
https://medium.com/@yegg/mental-models-i-find-repeatedly-useful-936f1cc405d
