There are three geographical subspecies: Sciurus griseus griseus (central Washington to the western Sierra Nevada in central California); S. g. nigripes (from south of San Francisco Bay to San Luis Obispo County, California; and S. g. anthonyi, which ranges from San Luis Obispo to northern Baja California).
Unity of command is ensuring unity of effort under one responsible person (or commander) for completing a task. This unity of command is one of the twelve principles of joint operations, and is defined as:
Headquarters of the United Nations Command and ROK-US Combined Forces Command in 2009. The United Nations Command (UNC) is the unified command structure for the multinational military forces, established in 1950, supporting South Korea (the Republic of Korea or ROK) during and after the Korean War.