sentences:  As this is a high-risk-low-return strategy for the winning side, already defeated side, or ill-matched opponent (difference of personal standing or martial reputation) it was acceptable to decline or elude the single combat.An example of single-combat with the tragic result for the victor is told in Heike Monogatari as Kumagai Naozane defeated Taira no Atsumori at the Battle of Ichi-no-Tani.It could be banned by the overall commander as needed and notably during Mongol invasions of Japan, particularly during the second invasion in 1281, samurai fought as massed mounted archer/warrior with the annihilation of enemy as the goal.