Strategy
early 19th century: from French stratégie, from Greek stratēgia ‘generalship’, from stratēgos (see stratagem).
wiktionary
From Ancient Greek στρατηγία(stratēgía, “office of general, command, generalship”), from στρατηγός(stratēgós, “the leader or commander of an army, a general”), from στρατός(stratós, “army”) + ἄγω(ágō, “I lead, I conduct”).
etymonline
strategy (n.)
1810, "art of a general," from French stratégie (18c.) and directly from Greek strategia "office or command of a general," from strategos "general, commander of an army," also the title of various civil officials and magistrates, from stratos "multitude, army, expedition, encamped army," literally "that which is spread out" (from PIE root *stere- "to spread") + agos "leader," from agein "to lead" (from PIE root *ag- "to drive, draw out or forth, move"). In non-military use from 1887.