On the internet, I sometimes see reference to the Dazexiang Uprising, a rebellion that occurred during the Qin Dynasty. From what I've heard, two officers (Chen Sheng and Wu Guang) led a peasant rebellion against the Qin government upon realizing they'd be late for their post, which was supposedly a capital offense at the time. I haven't heard much reference to it in historical circles, the only reference I can find to it in English outside of social media and op-eds is a Wikipedia article. More commonly, I see the rebellion referenced as an example of the consequences of needlessly Draconian laws/rules. Considering the context and lack of information I can find on the rebellion, I'm left to wonder if it actually happened, or if it's yet another case of bad history on the internet.
The rebellion is described by Sima Qian (c.140-c.85 BCE), who, while not a contemporary, wrote with access to earlier sources and is generally highly regarded as an historian. While it would be incautious to assume we can know very much about the fine details of events, it's thus usual to accept that the rebellion did occur.
The rebellion itself was a considerable one, though its origins were fairly small in scale (Sima Qian says that it was begun by only 900 men), and it is not uncommon today to see it mentioned as one of the first signs that the Qin dynasty was liable to fall, and even as the first in the series of events that led to that fall. Nonetheless, it owes its modern eminence in large part to its appropriation during the 1930s by Communist Chinese writers who seized on it as evidence that peasant rebellions against imperial authority had a very long history – a key finding, given the importance that was then being placed on legitimising and contextualising Mao's peasant revolution. Chinese historians writing from the 1950s focused on it because they saw it as the earliest identifiable Chinese rebellion which could be classified as "peasant" in origin – in the original source, Chen and Wu were not Qin officers, but in effect the NCOs appointed to lead the levy of men they later persuaded to rebel. This description is certainly a questionable one, based on the little we are told about what happened by Sima Qian, but it's why the rebellion has a prominent place in modern Chinese historiography.
Sima Qian's description of the rebellion can be read in translation here.
Sources
Michael Loewe, A Biographical Dictionary of the Qin, Former Han and Xin Periods, 221 BC - AD 24 (2000)
Deshan Xiong, Social History of China (2015)
Hing Ming Hung, The Road to the Throne: How Liu Bang Founded China's Han Dynasty (2011)
Shiao Ling Yu, Chinese Drama After the Cultural Revolution, 1979-1989 (1996)
Jack Dull, "Anti-Qin Rebels: No Peasant Leaders Here", Modern China 9 (1983)