Marriott acquired Starwood in 2016 and took control of the Starwood computer network in 2016. However, from July 2014 until September 2018, intruders in the system went undetected. This led to the breach of 131.5 million guest records pertaining to customers in the United States. The impacted records included contact information, gender, dates of birth, legacy Starwood Preferred Guest information, reservation information, and hotel stay preferences, as well as a limited number of unencrypted passport numbers and unexpired payment card information. Shortly after the breach of the Starwood database was announced, a coalition of 50 Attorneys General launched a multi-state investigation into the breach.