The Ford Model T reached the one-million-unit milestone in 1915.
Ford’s one-millionth Model T was completed on December 10, 1915. Sources often describe this as the millionth Model T being “sold,” although the milestone more precisely refers to cumulative production. That distinction does not change the quiz answer: the Model T crossed one million units during 1915.
The achievement followed Ford’s adoption of moving assembly-line production at its Highland Park plant in 1913. Faster production sharply reduced costs and helped turn the Model T into an affordable mass-market car. Ford also simplified manufacturing by standardizing the vehicle and famously concentrating production on black paint because it dried quickly.
The millionth car was only an early milestone. More than 15 million Model Ts were ultimately manufactured between 1908 and 1927. A common mix-up is confusing the 1915 milestone with the later point when Ford’s annual production exceeded one million cars; that happened after the Model T had already passed one million cumulative units.