When did Additional Continental Regiment end?

The "Additional Continental Regiment" doesn't refer to a specific military unit. It's a general term that could potentially refer to any of the various regiments added to the Continental Army during the American Revolutionary War.

To help you pinpoint the specific regiment you're interested in, I need more information:

* What year was this regiment formed? Knowing the founding year would help narrow down the possibilities.

* What state or region was it associated with? Some regiments were specifically raised in certain states.

* Are there any other details about the regiment you can provide? For example, did it have a specific commander or nickname?

With more information, I can help you determine when the regiment you're thinking of disbanded.