Original sentence: Of those eight divisions, two divisions were disbanded.On the other hand, the battle affected the PVA in a way which may have had the ultimate result of helping the United Nations Command secure its position in South Korea.The heavy casualties caused by both combat and poor logistical support destroyed much of the PVA's eight elite divisions of the 20th and the 27th Corps.and not until March 1951 did the 9th Army return to its normal strength and become combat effective
Edited sentence: First, according to historian Shu Guang Zhang, the belief amongst PVA commanders of their victory at Chosin helped convince them that they could  "defeat American armed forces" and this overconfidence would lead to a PVA invasion of South Korea in 1951 that would fail.Of those eight divisions, two divisions were forced to disband, and not until March 1951 did the 9th Army return to its normal strength and become combat effective.On the other hand, the battle affected the PVA in two ways which individually had the ultimate result of helping the United Nations Command secure its position in South Korea.Second, the heavy casualties caused by both combat and poor logistical support destroyed much of the PVA's eight elite divisions under the 20th and the 27th Corps