Complex sentence: Two regiments from the 7th supported the main assault by the 341st Division.The 18th Division withstood the initial NVA attacks and on 12 April were reinforced by men of the elite 1st Airborne Brigade and Vietnamese Marines.
Split into simpler sentences: Two regiments from the 7th supported the main assault by the 341st Division. The ARVN 18th Division withstood the initial NVA attacks and on 12 April were reinforced by men of the elite 1st Airborne Brigade and Vietnamese Marines.