Definition of "stratagem"

She will not yet be permitted to return to the Manor House: it is too convenient for 'treasons, stratagems,' &c.; and it is as well not to be put in the way of temptation: but she will be allowed perfect liberty in London.

1837, L[etitia] E[lizabeth] L[andon], “A Friend at Court”, in Ethel Churchill: Or, The Two Brides. […], volume II, London: Henry Colburn, […], page 265

While Collins does include a love triangle, a coming-of-age story, and other YA-friendly elements in the mix, they serve as a Trojan horse to smuggle readers into a hopeless world where love becomes a stratagem and growing up is a matter of basic survival.

2012 March 22, Scott Tobias, AV Club, The Hunger Games‎

His fiery eies are fixt vpon the earth.As if he now deuiſ’d some Stratageme:Or meant to pierce Auernus darkſome vauts.To pull the triple headed dog from hell.

c. 1587–1588, [Christopher Marlowe], Tamburlaine the Great. […] The First Part […], 2nd edition, part 1, London: […] [R. Robinson for] Richard Iones, […], published 1592; reprinted as Tamburlaine the Great (A Scolar Press Facsimile), Menston, Yorkshire, London: Scolar Press, 1973, (please specify the page)