Battles became all but bloodless; diplomacy and tactics superseded feats of arms and hard blows in pitched fields.
After performing several feats of valour, he was appointed by Hera to watch the cow into which Io had been transformed.
The principal feats of arms which mark the first years of John the Good's reign were the taking of St Jean d'Angely by the French in 1351, the defeat of the English near St Omer in 1352, and the English victory near Guines in the same year.
The building of the Canadian Pacific railway through almost continuous rocks for 800 miles was one of the greatest engineering feats of modern times.
The opposition was not always limited to feats of endurance of this kind.