Seven Years' War
In Europe, Frederick II of Prussia failed to complete a preemptive strike against Austria, and his opponents repulsed and at Kunersdorf nearly destroyed his forces. Frederick, however recovered, regained ground and managed to avoid any concessions in Hubertusburg, where the status quo ante bellum was restored. William Pitt's said, "America was won in Germany". He referred to the Prussian war effort, which enabled Britain to limit its continental commitments and to focus on her "blue water policy," successfully establishing naval supremacy. While French and allied forces were able to occupy Prussian and Hanoverian territories up to East Frisia, French ambitions to invade Britain and to continue with their commerce raiding were thwarted by a British naval blockade, which impaired French supply routes to the colonies.