Military tensions between the two leaders immediately increased. Theobald mobilised his forces along the border with Touraine; Henry responded by attacking Chaumont in Blois in a surprise attack; he took Theobald's castle in a siege. At the start of 1161 war seemed likely to spread across the region, until a fresh peace was negotiated at Fréteval that autumn, followed by a second peace treaty in 1162, overseen by Pope Alexander III. Despite this temporary halt in hostilities, Henry's seizure of the Vexin started a second long-running dispute between him and the kings of France.
