I&#x27;ll rephrase that and say &quot;North Vietnam received <i>substantial</i> military assistance from China and the Soviet Union later on in the war&quot;.<p><i>Which would be relevant if the NLF, on its own, pushed the US out of Vietnam.</i><p>Considering most of the fighting was in the South against NLF units, I&#x27;d say they played a big part in pushing the US out of Vietnam.  Think about what happened during the Tet Offensive.  It wasn&#x27;t the NVA carry most of the brunt.