Field Manual Interim 6-02.45 is the Army's doctrine for signal support at the theater level. It contains joint, Army, and proponent guidelines to support the entire signal spectrum of operations in the contemporary operational environment. This manual provides a doctrinal foundation for force design, combat development, professional education, and training of signal Soldiers. It establishes the importance of the LandWarNet, not only to the Soldiers' mission at the tactical levels, but also to the vital need at the theater commander's level. This manual provides information to leaders and planners on how signal assets and the LandWarNet support their operations.