High Quality Content by WIKIPEDIA articles! During the 1920s and 1930s, the United States military Joint Army and Navy Board developed a number of color-coded war plans to outline potential U.S. strategies for a variety of hypothetical war scenarios. The plans, which were developed by the Joint Planning Committee (which later became the Joint Chiefs of Staff) were officially withdrawn in 1939, in favor of five Rainbow Plans developed to meet the threat of a two-ocean war against multiple enemies.