Krulak asserted that a substantial amount of fighting was still required, particularly in the Mekong Delta, which was regarded as the Viet Cong's strongest region. Krulak asserted that all levels of the ARVN officer corps were conscious of the Buddhist crisis but he believed that most had not allowed religious beliefs to negatively affect their internal military relationships to a substantial degree. He believed that the ARVN officers were obedient and could be expected to carry out any order they regarded as lawful.