an unconditional surrender
se retirer de
the vanguard
the rearguard
defences (br) / defenses (am)
defensive
to defend sth against sth
a battlefield / a battleground
the trenches
barbed wire
the barbed wire entanglements
a sandbag
a bridgehead
the flank
reinforcements
to be reported missing
to be taken prisoner
to suffer heavy losses / to have many casualties
the wounded
a stretcher-bearer
a field hospital
the dead
killed in action
an explosive
an explosion
to explode
gunpowder
a sword
a dagger
a spear
a shield
a bow
a weapon
conventional / nuclear weapons
armaments
ammunition / munitions
an ammunition dump
armour (br) / armor (am)
to come under heavy fire
a raid on
to put to flight
to repel sb/sth
to reconnoitre (br) / to reconnoiter (am)
reconnaissance
a reconnaissance mission / patrol
to patrol
a patrol
a sniper
a landing
the D-day landings
D-day
to take a town / hill
to capture
to pursue
to (put to) rout
to drive sb back
to surround
to fall back
to retreat
a retreat
to give in / to give up
to surrender to
the surrender to