'tactically-divided' originates from the combination of 'tactical' and 'divide', where 'tactical' comes from the Greek word 'taktikos', meaning 'of or pertaining to arrangement', and 'divide' from the Latin 'dividere', meaning 'to separate'.

'taktikos' transformed into the Latin 'tacticus', and eventually became the modern English word 'tactical'. 'Dividere' evolved into the Old French 'diviser', and eventually became the modern English word 'divide'.

Initially, 'tactical' meant 'pertaining to arrangement', and 'divide' meant 'to separate'. Over time, 'tactically-divided' evolved to mean 'strategically separated for a specific purpose'.