THIS IS THE TWENTY-THIRD EDITION 0F THE USAF STATISTICAL DIGEST. IN ADDITION TO THE USUAL STATISTICAL SUMMARIES, MATERIAL REFLECTING USAF ACTIVITIES IN SOUTHEAST ASIA (SEA) HAVE BEEN INCLUDED AND MAY BE FOUND IN VARIOUS SECTIONS. PART I, AIR FORCE UNITS AND CAPABILITIES, INCLUDES DATA ON USAF AIRCRAFT POSSESSED AND COMBAT READY, AIRCREWS FORMED AND COMBAT READY, AND SQUADRONS LOCATED IN SEA. PART II, FLIGHT OPERATIONS, CONTAINS INFORMATION ON AVERAGE NUMBER OF AIRCRAFT. COMBAT AND COMBAT SUPPORT FLYING HOURS AND UTILIZATION RATES AS WELL AS THE NUMBER OF SORTIES FOR EACH OPERATIONAL AND SUPPORT BASE IN SEA. DATA ON AIRCRAFT INDICATING COMMAND OF POSSESSION IS ALSO SHOWN. PART III, SAFETY, INCLUDES DATA ON MAJOR AND MINOR AIRCRAFT FLIGHT ACCIDENTS IN SEA. PART IV, MATERIEL, UNDER WAR READINESS MATERIEL INCLUDES DATA ON AIR FORCE ORDNANCE EXPENDITURES IN SEA. PART VII, MILITARY ASSISTANCE PROGRAM, CONTAINS INFORMATION ON MILITARY ASSISTANCE (FWMAF/MASF/SOA) PROGRAM AND MILITARY APPROPRIATION SERVICE-FUNDED PROGRAM FORMAL TRAINING ACCOMPLISHMENT BY TYPE OF TRAINING. PART VIII, MILITARY PERSONNEL, REFLECTS DATA ON USAF OFFICERS AND AIRMAN CASUALTY INFORMATION IN SEA. MILITARY STRENGTH IN SEA MAY BE FOUND IN THE TABLE ON DUTY LOCATION OVERSEAS. PART IX, CIVILIAN PERSONNEL, REFLECTS DATA ON THE EMPLOYED STRENGTH OF CIVILIAN PERSONNEL IN SEA. PART X, MEDICAL, CONTAINS INFORMATION ON ADMISSION RATES FOR MAJOR ILLNESS GROUPS IN SEA. SOURCES FOR THE DATA CONTAINED HEREIN ARE THE PUBLISHED AND UNPUBLISHED RECORDS OF THE DATA SERVICES CENTER, EXCEPT WHERE OTHERWISE NOTED IN THE SOURCE INDICATED AT THE END OF EACH TABLE. SOME OF THE TABLES PUBLISHED IN THE FY 1967 ISSUE HAVE BEEN DELETED WHILE OTHERS HAVE BEEN COMBINED OR REVISED IN ORDER TO PRESENT MORE MEANINGFUL STATISTICAL DATA.