The most famous steam engine bubble in the 19th Century: https://en.wikipedia.org/wiki/Railway_Mania https://en.wikipedia.org/wiki/Railway_Mania Those popped

The most famous steam engine bubble in the 19th Century: https://en.wikipedia.org/wiki/Railway_Mania https://en.wikipedia.org/wiki/Railway_Mania Those popped all over Europe during the entire century, with the last one popping at the 1890s. For some reason, people focus only on this large one on the UK. Sources for how 19th Century imperialism had a lot of support from extend-and-pretend infrastructure bubbles are harder to search.