[citation wanted] UN troops recognized a defensive perimeter around the city often called the Pusan Perimeter in the summertime and fall of 1950. Since then, the city is a self-governing metropolis and has built a powerful city character. 4 pillars??in English, referring towards the four vital parts derived from these https://ricardo54bk2.jiliblog.com/89967053/the-busan-metropolitan-city-diaries