Although the American news media has often portrayed the Vietnam War as a primarily American and North Vietnamese conflict, the ARVN carried the brunt of the fight before and after large-scale American involvement, and participated in many major operations with American troops. ARVN troops pioneered the use of the M113 armored personnel carrier as an infantry fighting vehicle by fighting mounted rather than as a "battle taxi" as originally designed, and the armored cavalry (ACAV) modifications were adopted based on ARVN experience. One notable ARVN unit equipped with M113s, the 3d Armored Cavalry Squadron, used the new tactic so proficiently and with such extraordinary heroism against hostile forces that they earned the United States Presidential Unit Citation. The ARVN suffered 254,256 recorded deaths between 1960 and 1974, with the highest number of recorded deaths being in 1972, with 39,587 combat deaths, while approximately 58,000 U.S. troops died during the war. ‘content to let the Americans do the fighting and dying,’ and ‘weak in dedication, direction, and discipline.’ The President remained prone to issue instructions directly to field units, cutting across the entire chain of command. Major shortcomings identified by U.S. officers included a general lack of motivation, indicated, for example, by officers having an inclination for rear area jobs rather than combat command, and a continuing desertion problem.