Final answer:
The expansion of the Vietnam War led to the growth of counterculture through opposition to the war and establishment norms. Veterans' protests and a credibility gap between government reports and the reality of the war influenced counterculture's rise.
Step-by-step explanation:
The expansion of the Vietnam War led to the growth of counterculture through opposition to the war and establishment norms. As the war continued, an increasing number of Vietnam veterans returned home and contrasted their experiences with the government's official reports of victories against Communist forces, leading to protests by veterans. Moreover, the war created a credibility gap between the information reported by the government and the reality of the war, causing some Americans to question the country's role in Vietnam.