In the 1950s, the biggest enemy of the War to Resist US Aggression and Aid Korea was naturally the powerful US military. But the Volunteers faced a 17-nation coalition (a 16-nation United Nations force plus a South Korean army), so the United States was far more than the United States in terms of the ability to cause trouble to our army on the battlefield. Of course, armies like Luxembourg, South Africa, and the Netherlands going to North Korea basically belongs to the role of playing soy sauce, which can be ignored. So in addition to the U.S. military, which 3 other opponents were more threatening to the Volunteer Army at that time?
British Army. The United States and Britain were originally cognate countries, and militarily the British army was a long-term ally of the US military, and most of the wars in which the US military participated since World War II in the last century were supported by the British army. On the Korean battlefield, britain has dispatched more than 80,000 officers and soldiers, second only to the U.S. army in terms of numbers. The British army is strong, and the commanders have rich command and actual combat experience after the fight between World War II and the German army. The volunteer army has annihilated 3 ace battalions of the British army in Korea, but it cannot be denied that the fierce combat strength of the British army is actually more than that of the American army. It is the only country in the 16 armies of the United Nations army, except the US army, which has all three armed forces. More than 1,100 British troops were killed on the Korean battlefield, most of them by volunteers.
Turkish Army. Turkey is a country that has been in rapid decline since World War I, but during the Korean War Turkey was one of the most troops sent by the United Nations army, with the famous "Turkish Brigade" of more than 5,000 people. In fact, the 16-nation coalition in the Korean battlefield can only confront the Chinese and North Korean armies head-on, and the United States, Britain, and Turkey. The Turkish Brigade was a more effective tactical unit, but nearly 700 men were annihilated in the first battle of the Volunteer Army. Turkish officers and soldiers are strong, generally with their iconic beards, armed with machetes and powerful images, and even valued by the US military. However, due to the poor tactical level, the battlefield was repeatedly defeated by our army. The Turkish brigade also mistook the Rok army for a Chinese army because it could not distinguish the image characteristics of East Asians, and "annihilated" more than 200 people. Although this incident is ridiculous, it also proves from the side that the combat effectiveness of the Turkish army is not weak.
South Korean Army. Originally, when the Korean War broke out in June 1950, it was a civil war on the peninsula, and then the US military intervened in a large scale, and the volunteer army to resist the United States and aid Korea was the result of the expansion of the war, so the largest number of soldiers on the Korean battlefield was China, the United States, the DPRK, and the ROK. South Korea, which had a population twice that of North Korea at the time (21 million vs. 9 million), outperformed North Korea in terms of the number of troops that could be expanded after the war began. The early combat effectiveness of the Rokk army was very poor, basically composed of police, puppet troops, and newly recruited inexperienced soldiers who maintained order during The Japanese rule, and was not a rival to the Korean army at all, but after receiving a large number of American weapons and a large number of troops, the total number of people by the time of the 1953 armistice had exceeded 590,000. The ROK army has been trained by U.S. military instructors, and it is not as vulnerable as it was when it started the war, and its combat capability has gradually surpassed that of the Korean army, and it can even engage in tug-of-war confrontation with the volunteer army in some local battles, which shows how much it has improved.