For want of a nail？
For want of a nail the shoe was lost.For want of a shoe the horse was lost.
For want of a horse the rider was lost.
For want of a rider the battle was lost.
For want of a battle the kingdom was lost.
And all for the want of a horseshoe nail.
釘がないので 蹄鉄が打てない
蹄鉄が打てないので 馬が走れない
馬が走れないので 騎士が乗れない
騎士が乗れないので 戦いが出来ない
戦いが出来ないので 国が滅びた
すべては蹄鉄の 釘がなかったせい