Tactic

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mid 18th century: from modern Latin tactica, from Greek taktikē (tekhnē) ‘(art) of tactics’, feminine of taktikos, from taktos ‘ordered, arranged’, from the base of tassein ‘arrange’.

wiktionary

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Borrowed from Ancient Greek τακτικός(taktikós, “fit for ordering”), from τάσσω(tássō, “to order, to arrange”).

etymonline

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tactic (n.)

1766, from Modern Latin tactica, from Greek taktikē (tekhnē) "(art of) arrangement," from fem. of taktikos "pertaining to arrangement" (see tactics). Earlier it meant "a tactician" (1630s), and was in use as an adjective meaning "tactical" (c. 1600).