252. The Hay–Bunau-Varilla Treaty was a treaty signed on November 18, 1903, by the United States and Panama, that established the Panama Canal Zone and the subsequent construction of the Panama Canal.
253. Henry Cabot "Slim" Lodge (May 12, 1850 – November 9, 1924) was an American Republican Senator and historian from Massachusetts. He was also a friend and confidant of Theodore Roosevelt. He had the role (but not the title) of Senate Majority leader.
254. The Insular Cases are several U.S. Supreme Court cases concerning the status of territories acquired by the United States in the Spanish-American War (1898).
255. The Irreconcilables were bitter opponents of the Treaty of Versailles in the United States in 1919.
256. Jacob August Riis (May 3, 1849 – May 26, 1914) was a Danish American social reformer, "muckraking" journalist and social documentary photographer.
257. Jeannette Pickering Rankin (June 11, 1880 – May 18, 1973) was the first woman in the United States Congress, elected in Montana in 1916 and again in 1940.
258. John Aloysius Thivy was a prominent Malayan Indian nationalist and the founding president of the Malayan Indian Congress.
259. William II was the last German Emperor (Kaiser) and King of Prussia, ruling the German Empire and the Kingdom of Prussia from 15 June 1888 to 9 November 1918.
260. The Keating-Owen Child Labor Act of 1916 also known as Wick's Bill, was a short-lived statute enacted by the U.S. Congress which sought to address child labor by prohibiting the sale in interstate commerce of goods produced by factories that employed children under fourteen, mines that employed children younger than sixteen, and any facility where children under sixteen worked at night or more than eight hours daily.
261. league of nations The League of Nations (abbreviated as LN in English, and SDN in its other official languages) was an intergovernmental organization founded as a result of the Paris Peace Conference that ended the First World War.
262. Louis Dembitz Brandeis was an American lawyer and Associate Justice on the Supreme Court of the United States from 1916 to 1939.
263. Lusitania was an ancient Iberian Roman province including approximately all of modern Portugal south of the Douro river and part of modern Spain (the present autonomous community of Extremadura and a small part of the province of Salamanca).
264. The Mann–Elkins Act was a 1910 United States federal law that was among the Progressive era reforms.
265. Muller v. Oregon was a landmark decision in United States Supreme Court history, as it justifies both sex discrimination and usage of labor laws during the time period.
266. New Nationalism was Theodore Roosevelt's Progressive political philosophy during the 1912 election.
269.The Open Door Policy is a concept in foreign affairs, initially used to refer to the United States policy in late 19th century and early 20th century that would grant multiple international powers with equal access to China, with none of them in total control of that country.
270. The Panama Canal is a 77.1-kilometre (48 mi) ship canal in Panama that connects the Atlantic Ocean (via the Caribbean Sea) to the Pacific Ocean.
271. pancho villa was one of the most prominent Mexican Revolutionary generals.
272. The Platt Amendment of 1901 was an amendment to the military appropriations bill, constrained by the earlier Teller Amendment that forbade annexation of Cuba.
274. The Pure Food and Drug Act of 1906 was a key piece of Progressive Era legislation, signed by President Theodore Roosevelt on the same day as the Federal Meat Inspection Act.
275. Liliuokalani born Lydia Liliʻu Loloku Walania Wewehi Kamakaʻeha, was the last monarch and only queen regnant of the Kingdom of Hawaii.
277. The Roosevelt Corollary is a corollary to the Monroe Doctrine that was articulated by President Theodore Roosevelt in his State of the Union Address in 1904 after Venezuela Crisis of 1902–03.
278. rough riders The Rough Riders is the name