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Why Doesn’t the U.S. Use the Metric System?

Periodical Cicada, Adult, Magicicada spp. Requires 17 years to complete development. Nymph splits its skin, and transforms into an adult. Feeds on sap of tree roots. Northern Illinois Brood. This brood is the largest emergence of cicadas anywhere

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Why Is a Baker’s Dozen 13?

Amendments 1-10 to the Constitution of the United States constitute what is known as the Bill of Rights on an American flag.

What Is the Emoluments Clause?

Leonardo da Vinci (1452-1519), Italian Renaissance painter from Florence. Engraving by Cosomo Colombini (d. 1812) after a Leonardo self portrait. Ca. 1500.

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Los Angeles Police Department wanted flyer on Elizabeth Short, aka the "Black Dahlia," who was brutally murdered in January 1947. The FBI supported the Los Angeles Police Department in the case, including by identifying Short through her fingerprints that

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Hunyadi János summary

Written and fact-checked by The Editors of Encyclopaedia Britannica

Below is the article summary. For the full article, see János Hunyadi.

Hunyadi János, (born 1407?, Hunyad, Transylvania—died Aug. 11, 1456, Belgrade), Hungarian general. Son of a knight, he saw military service under King Sigismund. While in Italy he learned new military techniques from Francesco Sforza; returning to southern Hungary, he repelled Turkish attacks (1437–38) and was made governor of Transylvania. With aid from Venice and the pope, he mounted a campaign against the Turks (1441–43) that broke the Ottoman Empire’s hold on the Balkan states, though he was defeated in a Turkish counterattack at the Battle of Varna (1444). In 1446 he was elected regent for the young king, Laszlo V, and he served as governor of the kingdom of Hungary 1446–52. In 1456 he raised the Turkish siege of Belgrade before dying of disease. For stopping the supposedly invincible Turkish armies, he is considered a Hungarian national hero.

army Summary

Army, a large organized armed force trained for war, especially on land. The term may be applied to a large unit organized for independent action, or it may be applied to a nation’s or ruler’s complete military organization for land warfare. Throughout history, the character and organization of

government Summary

Government, the political system by which a country or community is administered and regulated. Most of the key words commonly used to describe governments—words such as monarchy, oligarchy, and democracy—are of Greek or Roman origin. They have been current for more than 2,000 years and have not

Hungary Summary

Hungary, landlocked country of central Europe. The capital is Budapest. At the end of World War I, defeated Hungary lost 71 percent of its territory as a result of the Treaty of Trianon (1920). Since then, grappling with the loss of more than two-thirds of their territory and people, Hungarians

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Figure 13: A Maxim machine gun, belt-fed and water-cooled, operated by German infantrymen, World War I.

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What Is the Emoluments Clause?

Why Is a Baker’s Dozen 13?

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9 of the World’s Deadliest Snakes

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army summary

Learn about the character and organization of armies

Written and fact-checked by The Editors of Encyclopaedia Britannica

Below is the article summary. For the full article, see army.

army, Large, organized force armed and trained for war, especially on land. The term may be applied to a large unit organized for independent action or to a nation’s or ruler’s overall military organization for land warfare. The character and organization of armies have varied through history. At various times armies have been built around infantry soldiers or mounted warriors (e.g., cavalry) or men in machines, and have been made up of professionals or amateurs, of mercenaries fighting for pay or for plunder, or of patriots fighting for a cause. See also air force, conscription, guerrilla, military unit, militia, U.S. Army.

Red Army Summary

Red Army, Soviet army created by the Communist government after the Bolshevik Revolution of 1917. The name Red Army was abandoned in 1946. The Russian imperial army and navy, together with other imperial institutions of tsarist Russia, disintegrated after the outbreak of the Russian Revolution of

United States Army Summary

United States Army, major branch of the United States armed forces charged with the preservation of peace and security and the defense of the country. The army furnishes most of the ground forces in the U.S. military organization. In the early months of the American Revolution, the first regular

Aratus Of Sicyon Summary

Aratus Of Sicyon was a Greek statesman of the Hellenistic Period, a skilled diplomatist and guerrilla fighter who for many years was the leading spirit of the Achaean League. After liberating Sicyon in 251, he established a democracy there and united it with the Achaean League for defense against

Attalus I Soter Summary

Attalus I Soter (“Preserver”) was the ruler of Pergamum from 241 to 197 bc, with the title of king after about 230. He succeeded his uncle, Eumenes I (reigned 263–241), and by military and diplomatic skill created a powerful Pergamene kingdom. Attalus’ mother, Antiochis, was a princess of the