又查了AI，这些法规有悠久的历史，同DEI八竿子打不着。。。

The policy of providing preference to veterans in federal hiring has a long history, dating back to the Civil War era. The first laws providing veterans preference were enacted in the aftermath of the Civil War, followed by further legislation in 1919 after World War I, which expanded the benefits. The Veterans' Preference Act of 1944 consolidated these existing laws and policies, establishing the foundation for the current system of veterans' preference in federal employment.  

Therefore, the core of the current Veterans' Preference system has been in place for over 80 years, dating back to the Veterans' Preference Act of 1944. It's important to note that the Act has undergone various amendments and expansions over the years to adapt to changing needs and address different groups of veterans, according to Wikipedia.