Longbow-Training

Field All english citizens
Went Obsolete It is still required by law, but not enforced since gunpowder became in common use
Made Obsolete By Gunpowder
Knowledge Assumed Hard training
When useful “In England, all men over the age of 14 must carry out two hours of longbow practice a day.” It is still law today. Source: http://business.timesonline.co.uk/tol/business/law/article2251280.ece(approve sites)

This skill is still exercised by longbow archers, most of whom belong to an archery club or a re-enactment society.