He subsequently commanded both the 2nd Battalion , Royal Australian Regiment ( 2 RAR ) and the 3rd Battalion , Royal Australian Regiment ( 3 RAR ) , and was the only officer to command all three of the original battalions of the Royal Australian Regiment .
He subsequently commanded the 3rd Battalion , Royal Australian Regiment ( 3 RAR ) in 1963 serving as the commanding officer of the 2nd Battalion , Royal Australian Regiment ( 2 RAR ) in 1963 -- 1964 . 
 Consequently , Jackson was the only officer to command all three of the original battalions of the Royal Australian Regiment .