Military operations other than war (MOOTW) focus on deterring war, resolving conflict, promoting peace, and supporting civil authorities in response to domestic crises. The phrase and acronym were coined by the United States military during the 1990s, but it has since fallen out of use. The UK military has crafted an equivalent or alternate term, peace support operations (PSO). Both MOOTW and PSO encompass peacekeeping, peacemaking, peace enforcement and peace building.