Answer: ROER

AnswerCrossword Clue
ROERDuren's River breached by Allied armies Feb., 1945.
ROERRiver crossed on way to Remagen.
ROERNetherlands river.
ROEROld big-game gun
ROERBig game gun
ROERVlodrop's river
ROERAfrican big-game gun
ROERDutch river
ROERS. African gun
ROERCape Town gun
ROEROld African big-game gun
ROERFormer African big-game gun
ROERRiver to the Maas