Short answers, pulled from the story.
Sixteen B-25 Mitchell bombers took off from the aircraft carrier Hornet and flew toward Tokyo, Nagoya, and Yokohama. All but one aircraft ran out of fuel over Chinese territory because the fleet was spotted earlier than planned.
Shunroku Hata commanded the China Expeditionary Army when the campaign began on the 15th of May 1942. Forty infantry battalions and fifteen artillery battalions moved westward along the Zhejiang-Jiangxi Railway under his orders.
Up to 250,000 Chinese civilians died during these reprisals as Japanese soldiers conducted massive searches for American airmen. Whole towns and villages suspected of harboring pilots were burned to the ground while many civilians executed died alongside those who sheltered the Americans.
Unit 731 brought almost 300 pounds of paratyphoid and anthrax to contaminate food sources and spread cholera, typhoid, plague-infected fleas, and dysentery pathogens in contaminated wells. The withdrawal from areas around Yushan, Kinhwa, and Futsin left these biological weapons behind.
All areas along the railway were recovered by September except for Jinhua, Wuyi, and the northeastern region. This four-month battle involved constant movement between major cities like Hangzhou and Nanchang.