 Overall, more than 6,500 people lost their lives during World War II in Wuppertal from such raids; 38 percent of the built-up urban area was destroyed.One of these RAF raids in February 1943 allegedly caused serious damage to the Goldschmitt adhesives firm, which was making "Tego-Film" wood adhesive for the German war effort - new aircraft designs meant to make large use of wooden airframe components, such as the Ta 154 "Moskito" and He 162 "Spatz" had their development seriously delayed or even temporarily curtailed as a result of the deficient replacement adhesive corroding the wooden airframes of such aircraft, resulting in crashes of the prototype airframes for both the mentioned Focke-Wulf and later Heinkel defensive fighter designs.