Conde appealed for aid to the German princes and to England: and grudge as she might the danger and cost of such a struggle, Elizabeth saw that her aid must be given. She knew that the battle with her opponent had to be fought abroad rather than at home. The Guises were Mary's uncles; and their triumph meant trouble in Scotland and worse trouble in England. In September therefore she concluded a treaty with the Huguenots at Hampton Court, and promised to supply them with six thousand men and a hundred thousand crowns. The bargain she drove was a hard one. She knew that the French had no purpose of fulfilling their pledge to restore Calais, and she exacted the surrender of Havre into her hands as a security for its restoration. Her aid came almost too late. The Guises saw the need of securing Normandy if English intervention was to be hindered, and a vigorous attack brought about the submission of the province. But the Huguenots were now reinforced by troops from the German princes; and at the close of 1562 the two armies met on the field of Dreux. The strife had already widened into a general war of religion. It was the fight, not of French factions, but of Protestantism and Catholicism, that was to be fought out on the fields of France. The two warring elements of Protestantism were represented in the Huguenot camp where German Lutherans stood side by side with the French Calvinists. On the other hand the French Catholics were backed by soldiers from the Catholic cantons of Switzerland, from the Catholic states of Germany, from Catholic Italy, and from Catholic Spain. The encounter was a desperate one, but it ended in a virtual triumph for the Guises. While the German troops of Coligni clung to the Norman coast in the hope of subsidies from Elizabeth, the Duke of Guise was able to march at the opening of 1563 on the Loire, and form the siege of Orleans. [Sidenote: Mary and Protestantism.]