The Book of the Week is “Fu-Go” by Ross Coen, published in 2014. This book describes the precursor to modern-day drones.
During WWII, extensive research in meteorology, materials science, engineering, physics and statistics was required to send the explosives-laden hot-air balloons about 6,000 miles from Japan to America. In 1942, the Japanese began the campaign with the goals of boosting its own national morale and taking a swipe at its enemy; more specifically, to start forest fires in the Western United States, and create terror among American civilians. This would prompt America to divert its war resources to the quell the distraction. Japan lacked the funds to continue this initiative until late 1944.
The parachutes portion was made of paper from blackberry trees, and pasted together by thousands of middle school and high school girls whose education had lapsed due to the war. They performed unhealthy manual labor at a school gym and a factory. Miraculously, with significant improvement in balloon design, a few hundred of the drones landed in Washington state, Idaho, California and Montana in rural areas. There was controversy over whether to warn civilians of the danger, as this might tell the Japanese how well its campaign was working, and reveal the flaws in its system. American authorities met with the Canadian government, and pressured the media into keeping silent for a long time.
Read the book to learn whether Japan achieved its goals with this seemingly minor yet creative plan of attack.