President Donald Trump is taking a lot of heat for the military operations he launched unilaterally as Commander in Chief of the U.S. armed forces against the Iranian pirates/terrorists: (1) striking Iran militarily, (2) closing the Strait of Hormuz to Iranian oil exports, and (3) aiming (I expect successfully) to force Iran into capitulation. In fact, what President Trump is doing today with Iran is nothing more than a long overdue exercise of U.S. military power, of the sort that Presidents Thomas Jefferson and James Madison engaged in, without congressional approval, against the Barbary Pirates from 1801 to 1815.
The Barbary pirates were an early 19th century analog of the modern-day Iranian terrorist regime. They preyed on American and European trading ships and enslaved their crews. It is estimated that over 1 million American and European sailors were sold into slavery by the Barbary pirates during the centuries in which they preyed on American and European shipping. Robert Davis, British Slaves on the Barbary Coast, BBC (February 17, 2011). The Barbary pirates sailed out of Libya and North Africa generally until France conquered Algeria in 1830.
Congress never declared war against the Barbary pirates, but Presidents Jefferson and Madison rightly used their executive Commander-in-Chief powers unilaterally to cause American ships and marines to subdue them with the use of U.S. armed force. This defeated the Barbary pirates, and the Framing generation, which was still mostly alive from 1801 to 1815, acquiesced in the constitutionality of this unilateral presidential use of military force. The United States has fought only five declared wars in our history since 1789—the War of 1812, the Mexican American War, the Spanish-American War, World War I, and World War II. But U.S. Presidents, acting as Commanders in Chief, have unilaterally deployed our armed forces many other times.
Presidents have deployed the U.S. military without congressional permission on at least 125 occasions like the one that subdued the Barbary Pirates (1801-1815). Some of those engagements have been quite bloody such as the Korean War (33,700 deaths in battle), the Vietnam War, for which congressional authorization was withdrawn from 1971 to 1975 (3,246 deaths in battle), and the overthrowing of Libyan dictator Muammar Gaddafi by President Obama, in 2011 (4 deaths including of a U.S. Ambassador). These engagements were not authorized but were paid for by Congress. John C. Yoo & Robert J. Delahunty, The President's Constitutional Authority to Conduct Military Operations Against Terrorist Organizations and the Nations that Harbor or Support Them. In addition, the U.S. has fought four undeclared wars with congressional authorization in my lifetime: the Vietnam War (1964-1971), the Gulf War (1991), the Afghan War (2001-2021), and the Iraq War (2003-2011). The gloss of history on the constitutional text supports everything that President Trump is now doing.
It is settled constitutional law after 237 years of practice that presidents have the power to use the U.S. military without Congress's permission to subdue pirates, and terrorists, like the now dead Ayatollah Ali Khamenei who was quite simply a modern-day pirate. Iran has been a huge problem for the U.S. since its Islamic Revolution in 1979.
Iran captured and held hostage the U.S. Ambassador to Tehran and more than 50 American embassy personnel from November 1979 to January 20, 1981. It killed 241 U.S. Marines with a terrorist attack on a U.S. military base in Lebanon on October 23, 1983. And for the last half-century, Iran has funded a host of Islamic terrorist organizations throughout the Middle East including Hezbollah (in Lebanon), Hamas (in the Gaza Strip), and the Houthis (in Yemen), all of which have attacked Israel and Saudi Arabia, who are American allies, as well as attacking U.S. military personnel in the Middle East.






