PAVN lured American forces into the hinterlands at Đắk Tô and at the Marine Khe Sanh combat base in Quảng Trị Province, where the U.S. fought a series of battles known as The Hill Fights. These actions were part of a diversionary strategy meant to draw U.S. forces towards the Central Highlands. Preparations were underway for the General Offensive, General Uprising, known as Tet Mau Than, or the Tet Offensive, with the intention of Văn Tiến Dũng for forces to launch "direct attacks on the American and puppet nerve centers—Saigon, Huế, Danang, all the cities, towns and main bases..." Le Duan sought to placate critics of the ongoing stalemate by planning a decisive victory. He reasoned that this could be achieved through sparking a general uprising within the towns and cities, along with mass defections among ARVN units, who were on holiday leave during the truce period. The Tet Offensive began on 30 January 1968, as over 100 cities were attacked by over 85,000 VC/PAVN troops, including assaults on key military installations, headquarters, and government buildings and offices, including the U.S. Embassy in Saigon. U.S. and South Vietnamese forces were initially shocked by the scale, intensity and deliberative planning of the urban offensive, as infiltration of personnel and weapons into the cities was accomplished covertly; the offensive constituted an intelligence failure on the scale of Pearl Harbor. Most cities were recaptured within weeks, except the former imperial capital of Huế in which PAVN/Viet Cong troops captured most of the city and citadel except the headquarters of the 1st Division and held on in the fighting for 26 days. During that time, they had executed approximately 2,800 unarmed Huế civilians and foreigners they considered to be enemy's spies. In the following Battle of Huế American forces employed massive firepower that left 80 percent of the city in ruins. Further north, at Quảng Trị City, the ARVN Airborne Division, the 1st Division and a regiment of the US 1st Cavalry Division had managed to hold out and overcome an assault intended to capture the city. In Saigon, Viet Cong/PAVN fighters had captured areas in and around the city, attacking key installations and the neighbourhood of Cholon before US and ARVN forces dislodged them after three weeks. During one battle, Peter Arnett reported an infantry commander saying of the Battle of Bến Tre (laid to rubble by U.S. attacks) that "it became necessary