Русско-англо-русский юридический словарь

In military organisation, unity of command is the principle that subordinate members of a structure should all be responsible to a single commander. (Wikipedia)

Under the principles of war, unity of command means that all the forces fall under one responsible commander. (Joint Base Charleston)

Unity of command is a classic principle of management theory in which each employee only responds to one supervisor. (Study.com)

Unity of command refers to each person in an organization who should take orders from and report to only one person. (The-definition.com)