What was the attitude towards the Vietnam War in 1965?

I always hear about the widespread outrage against the war in the late 60s/early 70s. I was wondering, would you have been able to tell then that it was going to be as controversial as it was?<br><br>For context, the US had 184,000 troops in Vietnam in 1965. In 1970, the US had 475,000 troops in Vietnam.