In addition to paratroopers, the Allies used motorless wooden gliders (like the Horsa and Waco) to land troops and heavy equipment behind enemy lines on D-Day. Gliders were silent and could deliver larger units—including jeeps and anti-tank guns—together in one spot, which paratroopers could not. However, they were extremely dangerous; pilots called them 'flying coffins' because they were made of thin plywood and often crashed into trees or 'Rommel's Asparagus' (wooden poles the Germans planted in fields to stop landings). Despite the risks, they were crucial for capturing key bridges, such as Pegasus Bridge, in the early hours of the invasion.