Yunhe hosted the Provincial government of
Zhejiang from the summer of 1942 till Japan's surrender in 1945 as part of the chain effect of the
Pacific War situation. To retaliate the
Attack on Pearl Harbor, the US navy launched the
Doolittle Raid against Japan's homeland on April 18, 1942. Sixteen bombers took off from the carrier
Hornet 700 miles away from Tokyo, and planned to fly to
Quzhou airfield (then spelled as Chuchow, about 110 miles from Yunhe) in the
Zhejiang Province after the raid. The raid was of little military consequence, but boosted American morale and showed that
Japan was more open to air attack than had been supposed. Both as a revenge for the raid and to capture the local airfields to prevent another, the following month the Japanese launched a 100,000-strong offensive into the
Zhejiang and
Jiangxi provinces where they also employed biological warfare, slaughtering no fewer than 250,000 Chinese before the Japanese withdrew in September. It was at the onset of the
Zhejiang-Jiangxi Campaign that the Provincial government made a further retreat southwest, finally settling in Yunhe for the rest of the war. ==Administrative divisions==