 Recent reforms in the United States and several European countries have placed greater emphasis on the brigade as the major tactical formation, with the division now acting more like a corps headquarters, controlling several relatively autonomous brigades and parceling out support units based on the tactical situation.Imperial Japanese Army divisions were organized as square divisions prior to 1938 when they began to form triangular divisions during the Second Sino-Japanese War.The Chinese National Revolutionary Army divisions were organized as square divisions prior to mid-1938 during the Second Sino-Japanese War.