There is no standing army in Dominica since 1981. Defense is the responsibility of Regional Security System (RSS).
The civil Commonwealth of Dominica Police Force includes a Special Service Unit, Coast Guard. In the event of war or other emergency, if proclaimed by the authorities, the Police Force shall be a military force which may be employed for State defence (Police Act, Chapter 14:01).
References
Military of Dominica Wikipedia(Text) CC BY-SA