World War II communists launched an offensive in Central China; in retaliation, Japan instituted harsh measures in occupied areas to reduce human and material resources for the communists. Continued antipathy between Chinese communist and nationalist forces culminated in armed clashes in January 1941, effectively ending their co-operation. In March, the Japanese 11th army attacked the headquarters of the Chinese 19th army but was repulsed during Battle of Shanggao. In September, Japan attempted to take the city of Changsha again and clashed with Chinese nationalist forces. German successes in Europe encouraged Japan to increase pressure on European governments in Southeast Asia. The Dutch government
Resistance during World War II occupied Poland during World War II, essentially a continuation of the Zamosc Uprising. During Operation Most III, in 1944, the Polish Home Army or Armia Krajowa provided the British with the parts of the V-2 rocket. Norwegian sabotages of the German nuclear program drew to a close after three years on 20 February 1944, with the saboteur bombing of the ferry SF Hydro. The ferry was to carry railway cars with heavy water drums from the Vemork hydroelectric plant, where they were produced, across Lake Tinn so they could be shipped to Germany. Its sinking effectively ended Nazi nuclear ambitions.