They add up the scores from the individual events to crown the overall champion.
The winning team gets bragging rights, but all competitors say they also get the opportunity to build relationships and share best practices and tactics with other departments.
Last year's champion, Glendale Police, are back again to defend their title. Campbell Police was the top Bay Area department. They came in second in 2017.
The Santa Clara County Sheriff's Department has been hosting the Best in the West SWAT Invitational Competition since 1992.