Around 800 hours of the happiest flying I ever did was on the Bell47G-3B1 Sioux with the Army in Germany. XT198 and XT199.
Being Engineers we photographed every culvert, drain and bridge over and under the autobahn from the south of Hamburg, via Fallingbostel, down to Kassel, doors off, middle of winter! It was our regiments job to demolish them all if Ivan came across the border! South of Kassel it was the Americans sector.