US conventional forces arrived in '65. Rolling Thunder was an AIR CAMPAIGN against North Vietnam!
Had nothing to do with the ground war in South Vietnam.
Operation Rolling thunder was an air campaign directed against NORTH Vietnam. Nape was predominately used against ground troops in SOUTH Vietnam.
1965
With a failure of bombing in the north, the American were forced to send in ground troops. Operation rolling thunder failed as the VC ( vietcong ) where well hiden in the tree canopies and so bombing was pointless.
Don't get caught up in that stereotyping of the war from the sixties (in which they used to say "ground troops & escalation" then left it at that); direct jet bombing occurred to the nation of North Vietnam in 1964 and escalated into Operation Rolling Thunder in '65, conventional ground troops simply established a conventional war to what had been strictly a guerrilla war.
Hundreds of thousands of "conventional" US troops began landing in country & the USAF and USN air units began blasting North Vietnam; Operation Rolling Thunder.
The war escalated at an extreme rate after 1965 due to the following; after congress passed the Gulf of Tonkin resolution, Lyndon Johnson had the full power of the American military at his disposal to send to Vietnam and with this massive increase in troops he also began Operation Rolling Thunder. Operation Rolling Thunder involved bombing North Vietnam until Ho Chi Minh ended the insurgency in the south. This did not occur, Johnson then sent a further 145 000 ground troops on search and destroy missions throughout the Vietnamese jungle.
In WWII they replaced battleships, becoming the new ruler of the seas. One carrier could sink two or more battleships. After WWII, carriers became portable airfields, providing close air support for troops on the ground. During the Vietnam War, carriers conducted air strikes at strategic targets in North Vietnam as part of Operation Rolling Thunder.
When Johnson took office in Nov 1963, the US had very few military personnel in Vietnam, mainly "advisors" who were there to help teach the South Vietnamese to fight against the North. Johnson was the President who began sending large numbers of troops, especially after the Gulf of Tonkin incident in Aug 1964.
The commander in chief asked for and received authority to use whatever force was necessary to protect US forces abroad. The commander in chief thus escalated the war from a guerrilla war into a conventional one; starting with fresh troops and commencing with Operation Rolling Thunder, the air war against North Vietnam.
Johnson like kennedy was very sensitve, He also did bombing stikes on NOrth Vietnam, He also Created Operation Rolling Thunder.
Australian troops on the ground were referred to as ' Diggers '
"Escalation" means to increase; an appropiate term. The war did escalate; it went from a guerrilla war of US military advisers and small unit contacts...to B-52 stratofortress bombers and hi-tech jet fighter plane dog-fights (aerial combat) over the skies of North Vietnam (Operation Rolling Thunder).