In the early years, the Rangers were formed as separated independent companie, they fought independently, suitable in a guerilla warfare.  They were best known for their aggressiveness and elan attacks, the Viet Cong (VCs) were afraid of and always tried to avoid a confrontation with the governmental soldiers with a snarling black panther painted in front of their helmets.  As the war escalated into conventional warfare, those independent Rangers companies were grouped together to form battalions then groups.  After the TET offensive the Rangers groups had participated in many large scale operations, the Cambodia incursion, Lam Son 719, and during the Easter offensive the Rangers helped in defending the cities of Quang Tri, An Loc, Kontum.  Those Rangers units continued to fight until the last minutes of the South Vietnam in the morning of April 30th 1975 when they were directed to lay down their arms.