Military Force Against Foreign EnemiesIn response to presidential requests, Congress has used its constitutional powerto declare war five times in the nationâs history: the War of 1812, the Mexican-American War, the Spanish-American War, World War I, and World War II.
Long reputation of providing high-quality work. CNA Engineering, Inc. in Sacramento, CA, is a civil engineering and surveying company providing expertise in the fields of civil engineering and planning that are essential to the development of a project.
Skip to Page Content. Nonprofit CNA provides in-depth research and solutions-oriented analyses to help decision makers understand issues, set policies, and manage operations. CNA serves the Navy and Marine Corps as well as federal, state, and local agencies. We analyze problems by getting as close as possible to the people, the data, and the problems themselves, to find clear, reliable answers. Across the U.S. and around the world, CNA analysts engage issues where they occur: in the field. Our analysts pioneered the field of operations research through their work with the Navy during World War II, work that continues today to address 21st century challenges.