Today Uijeongbu is a bustling satellite town of Seoul, with a 2nd infantry division of the United States Army. It also has a number of restaurants catering to US defence personnel. They serve a peculiar stew made originally for US Army personnel from SPAM and hot-dogs called "Uijeongbu budae jjigae".
In a 2013 interview with ABC news, he revealed that he had served in Japan after being drafted in 1957 (the war had ended in 1953). He was part of the Armed forces radio. He subsequently went to Korea to entertain troops right up to the DMZ.
William Christopher (Father Mulcahy) DID serve in the US Army in Korea - after the war was over in 1953 but before the armistice treaty was signed.