 Complete the following phrase:  Also headquartered at Saigon, BD 222, a smaller battalion with just six combat companies, was in turn assigned to the General Reserve Vietnamese: Tổng dự trữ of the National Police as a quick reaction unit that could be deployed nationwide, being tasked with specific missions and reinforcement duties. Engaged in Saigon during the Tet in 1968, the field policemen of BD 222 succeeded in flushing out the VC Sappers Vietnamese: Đắc Cộng entrenched in the National Radio Broadcasting Station building, located a few hundred meters away from the American Embassy, but also fought elsewhere. Between 1968 and 1975, the Battalions combat companies were deployed at various times and locations throughout the country, engaging in defensive and offensive operations in conjunction with other National Police or ARVN units at 