On the Italian Front, the high peaks of the Dolomites range were an area of fierce mountain warfare and mining operations. In order to protect their soldiers from enemy fire and the hostile alpine environment, both Austro-Hungarian and Italian military engineers constructed fighting tunnels which offered a degree of cover and allowed better logistics support. In addition to building underground shelters and covered supply routes for their soldiers, both sides also attempted to break the stalemate of trench warfare by tunneling under no man's land and placing explosive charges beneath the enemy's positions. Their efforts in high mountain peaks such as Col di Lana, Lagazuoi and Marmolata were portrayed in fiction in Luis Trenker's "Mountains on Fire" film of 1931.