The PAVN/VC returned to Saigon on 25 May and launched a second wave of attacks on the city. The fighting during this phase differed from "Tet Mau Than" and "Mini-Tet" in that no U.S. installations were attacked. During this series of actions, VC forces occupied six Buddhist pagodas in the mistaken belief that they would be immune from artillery and air attack. The fiercest fighting once again took place in Cholon. One notable event occurred on 18 June when 152 members of the VC "Quyet Thang" Regiment surrendered to ARVN forces, the largest communist surrender of the war. The actions also brought more death and suffering to the city's inhabitants. A further 87,000 were made homeless while more than 500 were killed and another 4,500 were wounded. During part of the second phase (5 May – 30 May) U.S. casualties amounted to 1,161 killed and 3,954 wounded,