1431 (MCDXXXI) ebile ngwaga wa go thoma ka Mokibelo, ngwaga wa bobedi ngwagengsome wa 1430s, ngwaga wa bomasometharo tee ngwagengkgolo wa Ngwagakgolo 15, le ngwaga wa bomakgolo nne masometharo tee ngwagengkete wa Ngwagakete 2.