Only Kronkite (sp?) said the Tet offensive was a loss — the lying partisan hack. It was a clear win. But, the lie was used by the Democrats to violate the defense treaty with SVietnam and condemn them to slavery.
As to Clloon, released USSR docs after the fall of the wall proved that everyone McCarthy charged with commie collusion was on the Soviet payroll. Not all the press and the Hollywood blacklisting, the ones actually accused.
And after the full pullout of all Active Duty US Armed Forces in 9172, the South Vietnamese were able to reple another Invasion from the North because they had US Airpower providing airborne artillery against the NoComs.
Until the Dems and RINOS pushed President Nixon to resign and then the Dems cut off all military funding to South Vietnam which was why the North finally won in 1975.
After the Tet Offensive, the Viet Cong was never a threat to the South or the USA again.
Charlie broke his back on Tet.
It was the North that hereafter did all the fighting. And most of that was after the so-called Paris Peace Agreements.