Film shows what happened after the Dambusters raid

News imageAFP via Getty Images A large, vintage World War Two bomber aircraft flies above a green forest. The plane is banking to the right and its long wingspan and the top of the fuselage are visible. It is painted in a brown and green camouflage design, with RAF roundels in blue and red on the wings and another in yellow, blue, white and red on the side of the fuselage. A glass cockpit and gun turrets can be seen.AFP via Getty Images
A Lancaster bomber flies over the Derwent Reservoir, where training for Operation Chastise took place, in 2013

Rare footage highlighting a little-known aspect of the Dambusters raid has gone on show.

While many people are familiar with the outline of the World War Two mission – when the RAF used "bouncing bombs" to destroy German dams – historians say the story of what happened next is not widely understood.

After Me, The Flood, an exhibition at the International Bomber Command Centre, Lincoln, highlights the casualties on both sides of the attack on the Mohne Dam, including at least 1,300 people killed in flooding.

German archivist Lena Lewald said: "The bombing of the dam has been a very successful feat of engineering, but there's so much more that needs to be added to have the full story."

The black and white footage, which is being shown in the UK for the first time, shows the damaged Mohne Dam, flooding in villages downstream and the destruction in other communities nearby.

Lewald helped curate the exhibition using documents and footage in the archive she runs in the German municipality of Mohnesee, which includes the dam.

She said the intention was not to undermine the narrative of the Dambusters as heroes, but "add to it".

"Usually, the narrative ends with the successful bombing of the dam and there's so much more that happened afterwards that isn't widely known here in England," she added.

News imageA woman with black hair is smiling with closed lips as she stands in an exhibition space. She is wearing large black glasses and a black T-shirt. Behind her stand more people, though the background is out of focus.
German archivist Lena Lewald helped curate the exhibit to highlight the human cost of the Dambusters raid

Lancaster bombers from 617 Squadron, based at RAF Scampton, near Lincoln, attacked three dams on the night of 16-17 May 1943.

Officially known as Operation Chastise, the raid breached the Möhne and Edersee dams, while the Sorpe Dam sustained minor damage.

Eight aircraft were lost and 53 out of 133 aircrew members died, with three others captured.

The exhibition is due to run until 28 February 2027 and includes letters by Barnes Wallis, who designed the bouncing bomb, and the diary of a Dutch prisoner forced to work on the Mohne dam's reconstruction.

News imageKeystone/Getty Images A black and white photo of a large dam, which has been breached at the centre, with a large volume of water pouring through the gap and frothing white as it lands in the valley below. The dam is in shadow, though the ragged rock in the breach is caught in the sunlight. To the right, a tower can be seen atop the dam wall.Keystone/Getty Images
A photo discovered in German archives showing the breach in the Mohne Dam in 1943

Nicky van der Drift, chief executive of the International Bomber Command Centre, said: "There's a lasting legacy that we're addressing here.

"With the current world situation, it's vital that we remember and that we educate about the output of war, the devastation that it brings to average people."

Air Marshall Mark Flewin, the RAF's air and space commander, said the exhibition would "shine a light on the suffering on both sides".

"We do not want to be in a war for national survival," he added. "There's huge sacrifice and cost as a result of that and I think the material we're seeing absolutely reflects that."

Listen to highlights fromLincolnshire on BBC Sounds, watch thelatest episode of Look North.

Download the BBC News app from the App Storefor iPhone and iPad orGoogle Play for Android devices