Answer: bef

AnswerCrossword Clue
BEF

Prior to (abbr.)

BEF

British troops at Dunkirk.

BEF

British army: Abbr.

BEF
British military group: Abbr.
BEF
Tommies of 1917.
BEFU. K. troops: Abbr.
BEFA.E.F.'s English counterpart
BEFPrev.