(Encyclopedia) Las Casas, Bartolomé de bärtōlōmā´ dā läs kä´säs [key], 1474–1566, Spanish missionary and historian, called the apostle of the Indies. He went to Hispaniola with his… (Encyclopedia) Casas, Bartolomé de las: see Las Casas . (Encyclopedia) Chiapas chēä´päs [key], state (1990 pop. 3,210,496), 28,732 sq mi (74,416 sq km), SE Mexico, on the Pacific Ocean between Guatemala and the Isthmus of Tehuantepec.… (Encyclopedia) civil defense, nonmilitary activities designed to protect civilians and their property from enemy actions in time of war. A civil defense program usually includes… (Encyclopedia) Preachers, Order of: see Dominicans . (Encyclopedia) Strategic Defense Initiative (SDI), former U.S. government program responsible for research and development of a space-based system to defend the nation from attack by… (Encyclopedia) Murillo, Bartolomé Estéban bärtōlōmā´ āstā´bän mo͞orē´lyō [key], 1617?–1682, Spanish religious and portrait painter. He was born in Seville, where most of his life was… (Encyclopedia) Defense, United States Department of, executive department of the federal government charged with coordinating and supervising all agencies and functions of the… (Encyclopedia) defense mechanism, in psychoanalysis, any of a variety of unconscious personality reactions which the ego uses to protect the conscious mind from threatening feelings and… (Encyclopedia) New Laws: see Las Casas, Bartolomé de .