A week after shuttering its last 28 campuses in the aftermath of a crippling settlement with the U.S. Department of Education last year, Corinthian Colleges filed for bankruptcy Monday in Delaware and announced plans to liquidate its operations.

Corinthian’s Chapter 11 filing reportedly marks the largest collapse of a higher education provider in U.S. history and reveals some of the Santa Ana, California-based company’s mounting legal bills ahead of its demise.