Notwithstanding this, the kings were continually overstepping the limits of their power, and insurrections and civil wars were all the time breaking out, in consequence of which the realms over which they reigned were kept in a perpetual state of turmoil. These wars arose sometimes from the contests of different claimants to the crown. If a king died, leaving only a son too young to rule, one of his brothers, perhaps--an uncle of the young prince--would attempt to seize the throne, under one pretext or another, and then the nobles and the courtiers would take sides, some in favor of the nephew and some in favor of the uncle, and a long civil war would perhaps ensue. This was the case immediately after the death of Richard I. When he died he designated as his successor a nephew of his, who was at that time only twelve years old. The name of this young prince was Arthur. He was the son of Geoffrey, a brother of Richard's, older than John, and he was accordingly the rightful heir; but John, having been once installed in power by his brother--for his brother had made him regent when he went away on his crusade to the Holy Land--determined that he would seize the crown himself, and exclude his nephew from the succession. So he caused himself to be proclaimed king. He was in Normandy at the time; but he immediately put himself at the head of an armed force and went to England. The barons of the kingdom immediately resolved to resist him, and to maintain the cause of the young Arthur. They said that Arthur was the rightful king, and that John was only a usurper; so they withdrew, every man to his castle, and fortified themselves there. In cases like this, where in any kingdom there were two contested claims for the throne, the kings of the neighboring countries usually came in and took part in the quarrel. They thought that by taking sides with one of the claimants, and aiding him to get possession of the throne, they should gain an influence in the kingdom which they might afterward turn to account for themselves. The King of France at this time was named Philip. He determined to espouse the cause of young Arthur in this quarrel. His motive for doing this was to have a pretext for making war upon John, and, in the war, of conquering some portion of Normandy and annexing it to his own dominions. So he invited Arthur to come to his court, and when he arrived there he asked him if he would not like to be King of England. Arthur said that he should like to be a king very much indeed. "Well," said Philip, "I will furnish you with an army, and you shall go and make war upon John. I will go too, with another army; then, whatever I shall take away from John in Normandy shall be mine, but all of England shall be yours." The situation of the country of Normandy, in relation to France and to England, may be seen by the accompanying map. [Illustration: SITUATION OF NORMANDY.]