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Though Congress acted after the U.S. withdrew from Vietnam to restrain presidents in their use of military force, recent decades have seen presidents pushing against those restraints.

Presidents have rarely federalized the National Guard to intervene in protests on U.S. soil, but since the latter half of the 20th century there has been an upward tick in their utility.

After the United States joined Israel's conflict with Iran by striking three of the nation's key nuclear sites, the Pentagon provided more details into what it is calling Operation Midnight Hammer.