Re: Earth ship Valiant
Yes, but all it really says is that the lingering effects of WW III (the "post-atomic horror") carried on through the 2070's. That doesn't mean the war was fought then.
That would contradict what was said in FIRST CONTACT about how the world straightened itself out and poverty and war were eliminated in the years that followed the flight of the Phoenix.
"The way that you wander is the way that you choose. / The day that you tarry is the day that you lose. / Sunshine or thunder, a man will always wonder / Where the fair wind blows ..."
-- Lyrics, Jeremiah Johnson's theme.