. . . . . . . "Battle on the Irghiz River" . "attacked Subutai shortly afterwards along the Irghiz River" . . . "on the Irghiz River" . "Between 14,000 and 40,000" . . . "Battle near the Irghiz River" . . "Between 6,000 and 60,000" . . "an unintended earlier encounter" . . "Battle on the Irghiz River" . "Khwarazmian Empire" . . "at least one battle" . . . . "Indecisive (Mongol army abandoned the field)" . . "Mongol Empire" .