 The Commandant of the United States Marine Corps is the highest @-@ ranking officer of the United States Marine Corps and a member of the Joint Chiefs of Staff , reporting to the Secretary of the Navy but not to the Chief of Naval Operations . Three Marines who served in 2nd Battalion 9th Marines became Commandant of the Marine Corps . They are listed in the table in accordance to the years in which they served as Commandants and their ranks are those which they held while serving in 2 / 9 , they were : 
 The Commandant of the United States Marine Corps <a href='drop_aux' title='1'><mark>is</mark></a>the highest @-@ ranking officer of the United States Marine Corps and a member of the Joint Chiefs of Staff , reporting to the Secretary of the Navy but not to the Chief of Naval Operations . Three Marines <a href='null_relcl' title='2'><mark>who</mark></a>served in 2nd Battalion 9th Marines became Commandant of the Marine Corps . They are listed in the table in accordance to the years in which they served as Commandants and their ranks <a href='drop_aux' title='3'><mark>are</mark></a>those which they held while serving in 2 / 9 , they <a href='uninflect' title='4'><mark>were</mark></a> : 
The Commandant of da United States Marine Corps the highest @-@ ranking officer of tdaUnited States Marine Corps and a member of thdaoint Chiefs of Staff , reporting to the Secretary of the Navy but not to thedaief of Naval Operations . Three Marines served in 2nd Battalion 9th Marines became Commandant of the Marine Corps . They r listed in the dale in accordance to the years in which they served as Commandants and their ranks those which they held while serving in 2 / 9 , they was :