Since the story on the @DeptofDefense's website on Jackie Robinson has been deleted, here are the details of his service in the United States military.
In 1942, Robinson was drafted and reported to Fort Riley, Kansas. By early 1943, he was commissioned as a second lieutenant before joining the 761st tank battalion, also known as the Black Panthers.
A year later, after Robinson boarded an Army bus, the driver asked him to retreat to the back. Robinson refused -- more than a decade before Rosa Parks. Robinson was court martialed and later acquitted.
He spent the rest of his military service at Camp Breckinridge, where he coached Army athletics teams. Robinson was honorably discharged in November 1944.