FreeCol:Colopedia.concepts.ref.description/en

The Monarch knows better than to trust a bunch of rag-tag conquistadors and religious malcontents unwilling to pay taxes and to bow to the fair demands of the Crown. For this reason, the Monarch keeps a special Royal Expeditionary Force (REF) ready to quell any attempts to declare independence and to secede from the home country. The Royal Expeditionary Force is partially balanced by the Intervention Force, which will be dispatched by a foreign power sympathetic to your cause, provided you can produce a sufficient number of liberty bells. From time to time, further units will be added to both the Royal Expeditionary Force and the Intervention Force.