USMC Reports Data Breach Impacting Sensitive Personal and Health Information The U.S. Marine Corps (USMC) recently disclosed a data breach to the New Hampshire Attorney General, revealing that sensitive personal identifiable information (PII) and protected health information (PHI) may have been compromised. The incident was detected on May 14, 2025, when USMC identified suspicious activity within a limited segment of its network. Following an investigation, USMC confirmed that an unauthorized third party accessed sensitive data. The exposed information varies by individual but may include: - Full names - Social Security numbers - Dates of birth - Contact details - Driver’s license and government ID numbers - Financial account information (e.g., mortgage details) - Medical records In response, USMC has begun notifying affected individuals via mail, providing details on the compromised data and offering complimentary credit monitoring services. The breach notice filed with the New Hampshire Attorney General outlines the scope of the incident and the steps taken to mitigate risks.