Not sure if the tag I've selected is appropriate. Feel free to correct.
Google's definition of gambit is shown below. Interestingly, the ngram usage graph shows that the popularity of the term dropped around 1800 and then rebounded in mid 1950's.
Why is it so? Has the raise any connection to WW2 or the Cold War? Any thoughts on the fall of popularity two centuries ago?
Or is it perhaps due to the way that the popularity is computed?
noun: gambit; plural noun: gambits
(in chess) an opening in which a player makes a sacrifice, typically of a pawn, for the sake of some compensating advantage.
a device, action, or opening remark, typically one entailing a degree of risk, that is calculated to gain an advantage.
"his resignation was a tactical gambit"
synonyms: stratagem, scheme, plan, tactic, maneuver, move, course/line of action, device;
mid 17th century: originally gambett, from Italian gambetto, literally ‘tripping up,’ from gamba ‘leg.’