Lancaster Bomber Dropping Poppies To Commemorate 80 Years Of Peace. To celebrate the anniversary of the legendary Second World War Dambusters raid. It has been nearly 80 years since the planes rehearsed Operation Chastise. The famous operation saw the RAF's 617 Squadron attack German dams using "bouncing bombs" on the night of May 16 and 17 in 1943. This peaceful poppy design is to mark the special occasion. Lightweight, Classic fit, Double-needle sleeve and bottom hem