Korean War two years of fighting became a war of attrition, with the front line close to the 38th parallel. The war in the air, however, was never a stalemate. North Korea was subject to a massive bombing campaign. Jet fighters confronted each other in air-to-air combat for the first time in history, and Soviet pilots covertly flew in defense of their communist allies. The fighting ended on 27 July 1953, when an armistice was signed. The agreement created the Korean Demilitarized Zone to separate North and South Korea, and allowed the return of prisoners. However, no peace treaty was ever signed,
Parallel Line (song) Parallel Line (song) On 15 December 2016, Fuji TV's Noitamina revealed that Sayuri would perform "Parallel Line" as ending theme song for "Scum's Wish". Parallel Line was released as a single on 1 March 2017 on three edition; Reguler edition, Limited edition and Limited anime edition. The single reached number 10 on Oricon and Japan Hot 100 and 4 on Japan Hot Animation with spent 8, 5 and 6 weeks respectively. The music video for "Parallel Line" was directed by Yasuhiro Arafune and the storyboards were created from "Scum's Wish's" author Mengo Yokoyari. The video features Sayuri singing in front