Few periods in American history have attracted more attention or had more written about them than the Civil Rights movement. In its most narrow sense, the Civil Rights movement refers to the struggle of African Americans to attain those rights granted to them by the 13th, 14th, and 15th Amendments to the United States Constitution. Although this struggle is usually said to have started with the Montgomery bus boycott of 1955, it actually goes back to the early years of World War II, when African Americans were denied work in America's defense industries.