The Korean War reached a point where neither side could gain an advantage over the other. This is known as a

Seesaw conflict

Explanation:

In the Korean war was fought after the World War II. The Korea war was fought between the North Korean which was supported by the Soviet Union and by South Korean led by the US troops. During the last one and a half year of the war, neither side was able to gain an advantage in the war.

In the year 1950, North Korea invaded South Korea. Neither of the party could gain an advantage in the war as there was a seesaw from south to north and again from north to south. Thus neither of the side could gain an advantage in the war.

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