统领 means 'to command' or 'to lead', typically a large group such as an army, a project, or an organization. It implies overall authority and direction, stronger than 指挥 (to direct) and broader than 命令 (to order). As a verb, it takes a direct object (the group being led). 统领 can also be used as a noun meaning 'commander', but this row covers only the verb usage.