During World War II, the Navajo Code Talkers were given a very important task. They sent secret messages by radio and telephone. The code they used contained words from the Navajo language. It was so difficult that other Navajo Marines couldn't decipher it. In the code, Navajo words represented English words and terms

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in february 1787, congress decided that a convention should be convened to revise the articles of confederation, the nation’s first constitution. in may, 55 delegates came to philadelphia, and the constitutional convention began. debates erupted over representation in congress, over slavery, and over the new executive branch. the debates continued through four hot and muggy months. but eventually the delegates reached compromises, and on september 17, they produced the u.s. constitution, replacing the articles with the governing document that has functioned effectively for more than 200 years.