Arromanches-les-Bains or simply Arromanches is a town in Normandy, France, located on the coast in the heart of the area where the Normandy landings took place on D-Day, on June 6, 1944.
The Normandy landings took place many years ago.
From the context we know that the Normandy landings took place on June 6, 1944, which is 75 years ago which would qualify as "many years ago."  Therefore the statement is definitely correct.
( z1 land :location ( z2 peninsula :name ( z3 name :op "Normandy" ) ) :time ( z4 before :op ( z5 now ) :quant ( z6 many :op ( z7 temporal-quantity :quant 1 :unit ( z8 year ) ) ) ) )