Webster's Revised Unabridged Dictionary
F. avant, before + E. guard, F. avant-garde,. See Avaunt
The advance guard L'avant-garde.
"Manual for Noncommissioned Officers and Privates of Cavalry of the Army" by U. S. War Department
It's well-accepted that "the avant garde becomes the old guard," and this is certainly true within the technology sector.
The Netherlands has a rich history of avante guard jazz.