conserving wherever possible on the use of vehicular assets. as an example of the latter, the 418th Ambulance Company ceased providing ambulance escorts to convoys operating in and around the Cam Ranh Bay area but continued, on the other hand, to provide medics in support of this requirement; only the medics that supported the requirement were transported in vehicles that made up the convoy, not ambulances. This, of course, satisfied the medical coverage requirement, yet at the same time conserved on ambulance usage. Sandbags became in critical supply around mid-summer and remained so for the rest of 1969, during which they were authorized for use by tactical elements only, making it necessary for all brigade units to use expedient materials for constructing protective shelters and revetments. Expedients included material such as artillery ammunition boxes, 55-gallon drums, salvaged crating material, etc.- Lumber, sizes 1x, 2x, 4x, to include plywood, became in critical supply during the summer and also remained chronically short through the end of 1969. to ensure that lumber was used only for the most pressing requirements throughout Vietnam USARV established a monthly allocation where in-country supplies were issued to major subordinate commands on a percentage basis, determined according to the number of critically urgent, engineer-approved construction projects in each command. This was a departure from previous procedures in that lumber was formerly allocated to construction activities only. Under the new system, each major subordinate command had to submit a monthly forecast of urgent projects along with a detailed justification for the lumber required in support of them. Lumber allocations to the brigade during the period July through December were approximately one-fourth of that which the headquarters had requested, and the majority of all received lumber went to the 32d Medical Depot to satisfy packing and crating material requirements. The lumber shortage delayed the start and completion of several brigade construction projects. It also prevented subordinate units of the brigade from doing any appreciable amount or self-help work to improve or renovate facilities. However, according to the Assistant Chief of Staff, G-4, USARV, the lumber position was expected to satisfy normal construction requirements by February 1970. As in 1968, vehicle repair parts, stationary, printing supplies, and other items ware intermittently in short supply throughout the year. Command assistance in redistribution of brigade assets generally resolved problems caused by those shortages. Maintenance programs and logistical readiness throughout the command improved as