 South Vietnamese forces were not constrained by the time and geographic limitations placed upon U.S. units . From the provincial capital of Svay Rieng , ARVN elements pressed westward to Kampong Trabek , where on 14 May their 8th and 15th Armored Cavalry regiments defeated the 88th PAVN Infantry Regiment . On 23 May , the South Vietnamese pushed beyond the deepest U.S. penetrations and attacked the town of Krek . 
 South Vietnamese forces <a href='uninflect' title='1'><mark>were</mark></a> not constrained by the time and geographic limitations placed upon U.S. units . From the provincial capital of Svay Rieng , ARVN elements pressed westward to Kampong Trabek , where on 14 May their 8th and 15th Armored Cavalry regiments defeated the 88th PAVN Infantry Regiment . On 23 May , the South Vietnamese pushed beyond the deepest U.S. penetrations and attacked the town of Krek . 
South Vietnamese forces was not constrained by da time and geographic limitations placed upon U.S. units . From tdaprovincial capital of Svay Rieng , ARVN elements pressed westward to Kampong Trabek , where on 14 May their 8th and 15th Armored Cavalry regiments defeated thda8th PAVN Infantry Regiment . On 23 May , thedauth Vietnamese pushed beyond the dapest U.S. penetrations and attacked the tda of Krek .