Lincolnshire was involved in the 1944 military milestones of both D-Day in June 1944 and Operation Market Garden (Arnhem) in September 1944. Soldiers from Poland and the US trained for action here and departed from local airfields. There is much still to see, the country houses where they were billeted, the pubs they relaxed in and the airfields they flew from.

Launched from Lincolnshire, American pathfinder troops were dropped behind enemy lines on the eve of D-Day to set markers for the incoming invasion. Operation Market Garden, was the largest airborne invasion in military history and the plans for it were made in the little village of Fulbeck.