The U.S. Capitol Police (USCP) are responsible for protecting the Capitol Hill complex encompassing the Senate and House office buildings and the Capitol building. Currently, the USCP operate numerous legacy systems, many of which exist as stovepipes. They are modernizing their suite of administrative and law enforcement systems. The USCP recognized that developing an enterprise architecture was an essential first step to ensure that the proper solution was selected, that key integration points between the individual systems were understood, and that a prioritized set of initiatives to remediate, renovate, or replace information systems could be planned and executed. We describe how to use standard UML models to capture architectural view information and some specific extensions that address areas in which UML is limited.