After securing territory in the Cotentin Peninsula south as far as Saint-Lô, the U.S. First Army launched Operation Cobra on 25 July and advanced further south to Avranches by 1 August. The British launched Operation Bluecoat on 30 July to secure Vire and the high ground of Mont Pinçon. Lieutenant General George S. Patton's U.S. Third Army, activated on 1 August, quickly took most of Brittany and territory as far south as the Loire, while the First Army maintained pressure eastward toward Le Mans to protect their flank. By 3 August, Patton and the Third Army were able to leave a small force in Brittany and drive eastward towards the main concentration of German forces south of Caen. Over Kluge's objections, on 4 August Hitler ordered a counter-offensive (Operation Lüttich) from Vire towards Avranches.