An organization is a group of units which have pooled together to coordinate their activities to improve their portrayal to the public and thus their enjoyment of the hobby. Unit sites will tend to give more detail about the hobby while organizational pages will give a broader calendar of events and perhaps more information overall. Unit sites are broken down into types. British means British Regulars - the Redcoats. Loyalists are Loyal Americans fighting alongside the Regulars.
Hessians are the British mercenary allies.
Continentals are the Rebel American line troops while Militia are state units of a more irregular nature. Finally French units are the Regular French line troops sent to America to aid the Rebel Americans. Both Unit and Organization sites should provide a calendar of events which that unit or organization plans to attend. Both should also give e-mail and other contact information for those with questions or wishing to explore possibly joining the hobby. The Sites link will lead you to a selection of pages with links to web pages concerning the various historic sites which have hosted re-enactments as well as other revolutionary war historic locales which may be of interest to a student of the period.