The US missile defense complex in Poland, also called the European Interceptor Site (EIS), was a planned United States missile defense base. It was intended to contain 10 silo-based interceptors: two-stage versions of the existing three-stage Ground Based Interceptors with Exoatmospheric Kill Vehicles that had a closing speed of about 7 km/s. The first planned complex was to be located near Redzikowo, Poland, forming a Ground-Based Midcourse Defense system in conjunction with a U.S. narrow-beam midcourse tracking and discrimination radar system located in Brdy, Czech Republic.