Tank
With World War II the multi-turreted tanks proved impracticable, and as the single turret on a low hull design became standard, crews became standardized around a crew of four or five. In those tanks with a fifth crew member, usually three were located in the turret (as described above) while the fifth was most often seated in the hull next to the driver, and operated the hull machine gun in addition to acting as a co-driver or radio operator. Well-designed crew stations, giving proper considerations to comfort and ergonomics, are an important factor in the combat effectiveness of a tank, as it limits fatigue and speeds up individual actions.
Cowboy
On average, a single herd of cattle on a drive numbered about 3,000 head. To herd the cattle, a crew of at least 10 cowboys was needed, with three horses per cowboy. Cowboys worked in shifts to watch the cattle 24 hours a day, herding them in the proper direction in the daytime and watching them at night to prevent stampedes and deter theft. The crew also included a cook, who drove a chuck wagon, usually pulled by oxen, and a horse wrangler to take charge of the "remuda," or herd of spare horses. The wrangler on a cattle drive was often a very young cowboy or one of lower social status, but the cook was a particularly well-respected member of the crew, as not only was he in charge of the food, he also was in charge of medical supplies and had a working knowledge of practical medicine.