trainband

A company of trained militia in England or America from the 16th to the 18th century.

A force of citizen soldiery identified with London; especially, one company or division of this force.

Sometimes used adjectively:

A band or company of an organized military force instituted by James I. and dissolved by Charles II.; — afterwards applied to the London militia.

a company of trained civilian militia operating in England and North America between the 16th and the 18th centuries

a company of militia in England or America from the 16th century to the 18th century