Cybersecurity company Mandiant in 2013 published a sensational report

on a Chinese hacking group known as APT1 (Advanced Persistent Threat 1). This group, linked to the Chinese military, had been stealing vast amounts of data from American companies for years. Mandiant's report detailed APT1's operations, their tactics, targets, and even identified some of the hackers by name. The exposure of APT1 highlighted the global scale of state-sponsored cyber threats.