I was in the USN in the late 70s. I saw jaw dropping discrimination. Anyone who was black was virtually untouchable, and given preferential treatment at every turn.
When I was in the USAF I was denied a promotion even though I was at the top of the list. When I went to the CO asking why this happened he told me outright that under orders from 3rd AF that stripe (only one came down) was to go to “a minority”.
This happened in 1962 when I was stationed in the UK.