On 12 April, the 2nd PAVN Division, elements of the 203rd Tank Regiment, and several independent regiments of the B-3 Front attacked the outpost at Tan Canh and the nearby Đắk Tô base. When the ARVN armor moved out of Ben Het toward Đắk Tô, it was ambushed and destroyed. The overwhelmed South Vietnamese defense northwest of Kon Tum quickly disintegrated, placing the command of III Corps in a quandary. With the remainder of the 22nd Division covering the coast there were few forces left to defend the provincial capital of Kon Tum.