1428 (MCDXXVIII) ebile ngwagamolele wa go thoma ka Labobedi, ngwaga wa bosenyane ngwagengsome wa 1420s, ngwaga wa bomasomepedi seswai ngwagengkgolo wa Ngwagakgolo 15, le ngwaga wa bomakgolo nne masomepedi seswai ngwagengkete wa Ngwagakete 2.