As the presidency (roju) system was introduced to the central organization of bakufu, a director-general of rikugun who was coequal to roju was established over the existing organization of rikugun.
幕府中枢への総裁江戸幕府の総裁（老中）制度導入により陸軍局が設置され、従来の陸軍組織の上に乗るかたちで老中格の陸軍総裁が置かれた。