Frogmen Of The US Navy: Suit Demonstration

The video reveals the secretive operations of Allied Progman military saboteurs who worked underwater before D-Day to dismantle the Nazis' Atlantic Wall. These saboteurs were equipped with unique helmets and rubber shoes for enhanced mobility, resembling characters from Jules Verne or HG Wells' stories.

What historical event were the saboteurs preparing for?

Which literary figures are referenced in relation to the saboteurs' equipment?