MacCaulay
Banned
November 2, 1966: KPA ambush on UN patrol, 6 US casualties, 1 South Korean casualty
August 29, 1967: KPA raid on Camp Bonifas
January 21, 1968: Assassination attempt on South Korean President Park Chung Hee, The Blue House Raid
January 23, 1968: Seizure of USS Pueblo off the east coast of the DPRK
October 30, 1968: Ulchin-Samchok landings by 120 men of the KPA 124th Army Unit
April 15, 1969: KPAF fighters shoot down a US Navy EC-121M aircraft over the Sea of Japan.
1971 Silmido Incident: Elite ROK troops trained to kill Kim Il Sung mutiny and go to Seoul.
August 18, 1976: Axe Murder Incident on the DMZ by KPA soldiers
So...let's just suppose that for some reason (the government of South Korea is more hawkish), after the Blue House Raid there is a concerted effort by the RoK Army to mobilize for war.
Then, on October 30, they use the landings as the straw that broke the camel's back and decide that instead of waiting for an invasion that the government feels is imminent, they'll attack across the DMZ first.
How would the forces on the peninsula stack up in late-1968 for an offensive thrust into North Korea?