<prompt> Feleletša polelo ye e latelago: Nakong ya Ntwa ya Monterrey ka September 21-24, 1846, sehlopha sa Duncan se ile sa abelwa brigade ya Thomas Staniford sehlopheng sa William J. Worth. Taylor o ile a hlasela motse go tšwa ka leboa, mola a romela madira a Worth go hlasela go tšwa ka bodikela. Dibetri tša Duncan le William W. Mackall di be di akaretšwa go thopeng ga Ntlo ya Bapišopo ka la 22 Setemere. Duncan o ile a fiwa maemo a go ba mokolonele ka baka la boitshwaro bjo sebete le bjo bo holago kua Monterrey. Mathomong a January 1847, Taylor o ile a laelwa gore a fetišetše dihlopha tša Worth le Twiggs le dibetri tše pedi, go akaretša le tša Duncan, go madira a Winfield Scott. Duncan o ile a lwa kua  <response>: Go rakelelwa ga Veracruz ka March 9-29, 1847, Ntweng ya Cerro Gordo ka April 17-18, le ntweng ya kua Amazoque ka May 14. 