Just as the Soviets had learned a lot about urban warfare, so had the Germans. The "Waffen-SS" did not use the makeshift barricades erected close to street corners, because these could be raked by artillery fire from guns firing over open sights further along the straight streets. Instead, they put snipers and machine guns on the upper floors and the roofs - a safer deployment as the Soviet tanks could not elevate their guns that high. They also put men armed with "panzerfausts" in cellar windows to ambush tanks as they moved down the streets. These tactics were quickly adopted by the Hitler Youth and the First World War "Volkssturm" veterans.