Finnish infantry crossing a river at Olonets Karelia using an "Iivar’s Bridge", named after its inventor Captain Iivari Akseli Kauranen, during the retreat in Continuation War in 1944. The pioneers could quickly make these pontoon bridges by lashing together branches and planks of wood. Kauranen himself was a Jäger officer who retired as a Colonel from duty of Inspector of Engineer Corps. He also co-designed another quick-build floating bridge: Pikasilta M/32, nicknamed after the designer: Iivarin Pikasilta.
Book "Finland at War: The Continuation and Lapland Wars 1941-45 by Vesa Nenye