 The communists 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 , Viet Cong 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 Viet Cong 's 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 the second phase ( 5 May – 30 May ) U.S. casualties amounted to 1 @,@ 161 killed and 3 @,@ 954 wounded , while 143 South Vietnamese servicemen were killed and another 643 were wounded . 
