What environmental conditions led Viking raids on other countries?

The climate also affected the Scandinavian's seafaring and raiding. Summer storms stopped the movement of the Vikings to new lands and winter sea-ice is one of the causes of the first overwintering for raiding of the Norse on mainland Europe.

answer; the confederacy could afford to move a large number of prisoners hundreds of miles but could not afford to fee and house the prisoners;

answer; first blankindependent; second blank; /(french); ///