Trench warfare, total war, war of attrition, war communism, and planned economies during significant historical events like WWI and the Russian Revolution.
Trench warfare: Fighting from ditches protected by barbed wire, as seen in WWI.
Total war: Involving the complete mobilization of resources and people, affecting all citizens' lives.
War of attrition: A war based on wearing down the other side by constant attacks and heavy losses.
War communism: Russian government control of business and centralization of state administration under Communist control.
Planned economies: Economic system directed by government agencies for centralized management.