Engineers*
*
By June 1968 there was an engineer battalion in each of the 10 divisions, 13 separate combat engineer battalions (4 group headquarters), and 8 engineer construction battalions (2 group headquarters).*
*
In 1972 combat engineers increased to 11 divisional battalions and in 1973 to 12; separate combat battalions reduced during 1970 from 13 to 12 and remained at that number, along with the four group headquarters.*
*
Construction battalions increased to 10 in 1969, 13 in 1970, and to 17 in 1971 (all figures as of June), with the construction group headquarters increasing to 3 in 1970 and 4 in 1971.*