Britain's war against the Americans, the French, and the Spanish cost about £100 million, and the Treasury borrowed 40-percent of the money that it needed. Heavy spending brought France to the verge of bankruptcy and revolution, while the British had relatively little difficulty financing their war, keeping their suppliers and soldiers paid, and hiring tens of thousands of German soldiers. Britain had a sophisticated financial system based on the wealth of thousands of landowners who supported the government, together with banks and financiers in London. The British tax system collected about 12 percent of the GDP in taxes during the 1770s.