How far do you agree that the Valois threat was the greatest problem in Caroline foreign policy?

It appears that Charles' greatest threat and opposition came from the French in the form of Francis Valois. In 1515 when he came to the throne he was only 15 but was determined to be a major power in Europe. Roberts, a historian describes his main aims, when he first came to the throne, as being "to enhance his own and France's reputation through success in battle" and "to reassert the French claim to Milan." He wanted …

…occupy Transylvania but again he was pushed back as his army was out of its depth. Hungary turned against the Hapsburgs as Ferdinand's commanders had the bishops assassinated. Hungary posed a problem to the Hapsburgs during this time, however it seems the least important factor in the Caroline foreign policy as it did not involve Charles. It was Ferdinand who campaigned for his claim to the Hungarian throne and Charles was never involved in this.