Which World War II military vehicle's marketing strategy included promoting it as a civilian product post-war, leading to an entirely new consumer market segment?

Throughout military history, product development and marketing strategies have played crucial roles in gaining advantages on the battlefield. From camouflage techniques to weapon branding, military equipment has undergone fascinating marketing and design evolutions. This trivia question explores how one iconic military product's marketing strategy revolutionized public perception during a pivotal historical period.

This is a live public trivia poll on AIPolls.Net. Vote and see real-time results.

Jeep Willys MB (which later became the civilian CJ series)
Sherman Tank (marketed as agricultural tractors)
P-51 Mustang Fighter (promoted as racing aircraft)
Dodge WC series trucks (advertised as construction vehicles)