Britain ended the uneasy truce created by the Treaty of Amiens when it declared war on France in May 1803. The British were increasingly angered by Napoleon's reordering of the international system in Western Europe, especially in Switzerland, Germany, Italy and the Netherlands. Kagan argues that Britain was especially alarmed by Napoleon's assertion of control over Switzerland. The British felt insulted when Napoleon said it deserved no voice in European affairs (even though King George was an elector of the Holy Roman Empire), and sought to restrict the London newspapers that were vilifying him.