History of the horse in Britain drawn by two horses, the "Dutch plough", was used in eastern England; this was followed in 1730 by the lightweight Rotherham plough, an unwheeled, or "swing" plough. It was advertised as reducing ploughing times by a third, or using a third less horsepower for the same ploughing time. The improved seed drill and horse-hoe were invented by Jethro Tull in 1731; but it took more than 100 years for these designs to come into common use. The earliest horse-powered threshing machines, which were installed permanently in barns, were developed towards the end of the 18th century. The use of fast
Drill instructor of which the most well known is Basic Training or boot camp. Their responsibilities include areas such as military discipline, physical fitness, and weapons training. The title of Drill Instructor is a billet independent of rank, to be held by Non-Commissioned Officers who successfully complete the intense training program to earn that title. The rank held by drill instructors varies by branch: The arduous nature of drill instructor duty means that such assignments are among the most prestigious carried out by enlisted personnel. Those who become drill instructors are eligible for a variety of military awards, such as the Marine