Internment of German resident aliens and German-American citizens occurred in the United States during the periods of World War I and World War II. During World War II, the legal basis for this detention was under Presidential Proclamation 2526, made by President Franklin D. Roosevelt under the authority of the Alien Enemies Act.

With the U.S. entry into World War I after Germany's unrestricted submarine warfare, as well as the Zimmermann telegram, German nationals were automatically classified as enemy aliens. Two of four main World War I-era internment camps were located in Hot Springs, North Carolina, and Fort Oglethorpe, Georgia.The U.S. Confiscated Half a Billion Dollars in Private Property During WWI, America’s home front was the site of internment, deportation, and vast property seizure, Smithsonian Magazine Attorney General A. Mitchell Palmer wrote that "All aliens interned by the government are regarded as enemies, and their property is treated accordingly."

By the time of WWII, the United States had a large population of ethnic Germans. Among residents of the United States in 1940, more than 1.2 million persons had been born in Germany, 5 million had two native-German parents, and 6 million had one native-German parent. Many more had distant German ancestry. Between 1940 and 1948, the United States detained at least 11,507 German Americans (excluding thousands of voluntary Internees, many of whom were children) and 4,058 German Latin Americans. The adults were overwhelmingly permanent residents who had not completed naturalization, while most of the children interned with their parents were U.S. born. The government examined the cases of German nationals individually, and detained relatively few in internment camps run by the Department of Justice, as related to its responsibilities under the Alien Enemies Act. To a much lesser extent, some ethnic German US citizens were classified as suspect after due process and also detained. Similarly, a small proportion of Italian nationals and Italian Americans were interned in relation to their total population in the US. The United States had allowed immigrants from both Germany and Italy to become naturalized citizens, which many had done by then.

In the early 21st century, Congress considered legislation to study treatment of European Americans during WWII, but it did not pass the House of Representatives. Activists and historians have identified certain injustices against these groups. Unlike Italian Americans and Japanese Americans, German American internees have never received financial compensation or an official apology for these events.

World War I

Civilian internees President Woodrow Wilson issued two sets of regulations on April 6, 1917, and November 16, 1917, imposing restrictions on German-born male residents of the United States over the age of 14. The rules were written to include natives of Germany who had become citizens of countries other than the U.S.; all were classified as aliens.The New York Times: "Gregory Defines Alien Regulations," February 2, 1918, accessed April 2, 2011. The rules for subjects of Austria-Hungary were far less restrictive. New York Times: "Puts No Rigid Ban on Austrians Here," December 13, 1917, accessed April 3, 2011 Some 250,000 people in that category were required to register at their local post office, to carry their registration card at all times, and to report any change of address or employment. The same regulations and registration requirements were imposed on females on April 18, 1918.Arnold Krammer, Undue Process: The Untold Story of America's German Alien Internees (Lanham, MD: Rowman & Littlefield, 1997), 14 Some 6,300 such aliens were arrested. Thousands were interrogated and investigated. A total of 2,048 (0.8%) were incarcerated for the remainder of the war in two camps, Fort Douglas, Utah, for those west of the Mississippi, and Fort Oglethorpe, Georgia, for those east of the Mississippi.Krammer, Undue Process, 14-5

The cases of these aliens, whether being considered for internment or under internment, were managed by the Enemy Alien Registration Section of the Department of Justice. From December 1917 this section was headed by J. Edgar Hoover, then not yet 23 years old.Ann Hagedorn, Savage Peace: Hope and Fear in America, 1919 (NY: Simon & Schuster, 2007), 327–8

Among the notable internees were the Jewish geneticist Richard Goldschmidt and 29 players from the Boston Symphony Orchestra (BSO).New York Times: "Dr. Muck Bitter at Sailing," August 22, 1919, accessed January 13, 2010 After being falsely accused by unscrupulous newspaper editor John R. Rathom of knowingly refusing a request to play The Star Spangled Banner, the BSO's conductor, Karl Muck, also spent more than a year interned at Fort Oglethorpe, as did Ernst Kunwald, the music director of the Cincinnati Symphony Orchestra.Harold Schonberg, The Great Conductors (NY: Simon and Schuster, 1967), , 216–222 One internee described a memorable concert in the mess hall packed with 2,000 internees, with honored guests such as their doctors and government censors on the front benches, facing 100 musicians. Under Muck's baton, he wrote, "the Eroica rushed at us and carried us far away and above war and worry and barbed wire."New York Times: Erich Posselt, "Muck's Last Concert in America," March 24, 1940, New York Times, accessed January 13, 2010

Most internees were paroled in June 1919 on the orders of Attorney General A. Mitchell Palmer.Stanley Coben, A. Mitchell Palmer: Politician (NY: Columbia University Press, 1963), 200–1 Others remained interned until as late as March and April 1920.Krammer, Undue Process, 15

Merchant marine vessels Until the U.S. declared war on Germany, German commercial vessels and their crews were not detained. In January 1917, there were 54 such vessels in mainland U.S. ports and one in San Juan, Puerto Rico, free to leave.New York Times: Queries from Times Readers," January 7, 1917, accessed April 1, 2011 With the declaration of war, 1,800 merchant sailors became prisoners of war.Robert C. Doyle, The Enemy in our Hands: America's Treatment of Prisoners of War from the Revolution to the War on Terror (University Press of Kentucky, 2010), 169

Over 2,000 German officers and sailors were interned in Hot Springs, North Carolina, on the grounds of the Mountain Park Hotel.Jacqueline Burgin Painter, "The German Invasion of Western North Carolina" (Biltmore Press, 1992)

Military internees Before the U.S. entered the war, several Imperial German Navy vessels were docked in U.S. ports; officials ordered them to leave within 24 hours or submit to detention. The crews were first treated as alien detainees and then as prisoners of war (POWs). In December 1914 the German auxiliary cruiser Cormoran, pursued by the Imperial Japanese Navy, tried to take on provisions and refuel in Guam. When denied what he required, the commanding officer accepted internment as enemy aliens rather than return to sea without sufficient fuel. The ship's guns were disabled. Most of the crew lived on board, since there were no housing facilities available. During the several years the Germans were detainees, they outnumbered U.S. Marines in Guam. Relations were cordial, and a U.S. Navy nurse married one of the Cormoran's officers.

As a result of U-boat attacks on U.S. shipping to Europe, the U.S. broke off diplomatic relations with Germany on February 4, 1917. U.S. officials in Guam then imposed greater restrictions on the German detainees. Those who had moved to quarters on land returned to the ship. Following the U.S. declaration of war on Germany in April 1917, the Americans demanded "the immediate and unconditional surrender of the ship and personnel." The German captain and his crew blew up the ship, taking several German lives. Six whose bodies were found were buried in the U.S. Naval Cemetery in Apra with full military honors. The surviving 353 German service members became prisoners of war, and on April 29 were shipped to the U.S. mainland.New York Times: "Blow up Cormoran, Interned Gunboat," April 8, 1917, accessed March 30, 2011; Robert F. Rogers, Destiny's Landfall: A History of Guam (University of Hawaii Press, 1995), 134–40, available online, accessed April 1, 2011

Non-German crewmen were treated differently. Four Chinese nationals started work as personal servants in the homes of wealthy locals. Another 28, Melanesians from German New Guinea, were confined on Guam and denied the rations and monthly allowance that other POWs received.They were shipped home to New Guinea on a Japanese schooner on January 2, 1919. Hermann Hiery, The Neglected War: The German South Pacific and the Influence of World War I (University of Hawaii Press, 1995), 35, available online, accessed April 4, 2011 The crews of the cruiser Geier and an accompanying supply ship, which sought refuge from the Imperial Japanese Navy in Honolulu in November 1914, were similarly interned, becoming POWs when the US entered the war.New York Times: "The Geier Interned until the War Ends," November 9, 1914, accessed March 30, 2011; New York Times: "Diary Bares Plots by Interned Men," December 29, 1917, accessed March 30, 2011

Several hundred men on two other German cruisers, the Prinz Eitel Friedrich and Kronprinz Wilhelm, unwilling to face certain destruction by the Royal Navy in the Atlantic, lived for several years on their ships in various Virginia ports and frequently enjoyed shore leave.New York Times: "The Interned German Sailors," June 27, 1915, accessed March 30, 2011 Eventually they were given a strip of land in the Norfolk Navy Yard on which to build accommodations. They constructed a complex commonly known as the "German village", with painted one-room houses and fenced yards made from scrap lumber, curtained windows, and gardens of flowers and vegetables, as well as a village church, a police station, and cafes serving non-alcoholic beverages. They rescued animals from other ships and raised goats and pigs in the village, along with numerous pet cats and dogs.Popular Science Monthly: "A German Village on American Soil", v. 90, January–June 1917, 424–5, accessed April 1, 2011 On October 1, 1916, the ships and their personnel were moved to the Philadelphia Navy Yard along with the village structures,Great Lakes Recruit: "The German auxiliary...", vol. 4, no. 11, November 1918, accessed April 1, 2011 which again became known locally as the "German village". In this more secure location in the Navy Yard behind a barbed wire fence, the detainees designated February 2, 1917, as Red Cross Day and solicited donations to the German Red Cross.New York Times: "Neutral Ships Held Here," February 3, 1917, accessed March 30, 2011 As German-American relations worsened in the spring of 1917, nine sailors successfully escaped detention, prompting Secretary of the Navy Josephus Daniels to act immediately on plans to transfer the other 750 to detention camps at Fort McPherson and Fort Oglethorpe in late March 1917,New York Times: "Ten Interned Men Made their Escape," March 21, 1917, accessed March 30, 2011 where they were isolated from civilian detainees.New York Times: "Germans Interned at Georgia Forts," March 28, 1917, accessed March 30, 2011. More than 400 from the Wilhelm went to Fort McPherson, and the rest to Fort Oglethorpe. Following the U.S. declaration of war on Imperial Germany, some of the Cormoran'''s crew members were sent to McPherson, while others were held at Fort Douglas, Utah, for the duration of the war.

World War II