In the early days of the occupation, a powerful and increasingly well-coordinated Soviet partisan movement emerged. Hiding in the woods and swamps, the partisans inflicted heavy damage to German supply lines and communications, disrupting railway tracks, bridges, telegraph wires, attacking supply depots, fuel dumps and transports, and ambushing Axis soldiers. In one of the most successful partisan sabotage actions of the entire Second World War, the so-called Asipovichy diversion of July 30, 1943, four German trains with supplies and Tiger tanks were destroyed.