<Li> Chuam - ni </Li> <Li> Ripper (4th Battle of Seoul) </Li> <Li> Maehwa - san </Li> <Li> Spring Offensive <Ul> <Li> Imjin River </Li> <Li> Yultong </Li> <Li> Kapyong </Li> <Li> Soyang River </Li> </Ul> </Li>

What events in the us and ussr led to the signing of a ceasefire in july 1953