Goguryeo was a kingdom that ruled across the north and center of the Korean peninsula. Its territory extended into Manchuria, encroaching on Sui Dynasty territory. The Sui forces vastly outnumbered the Goguryeo. General Mondeok carried out a strategy. The goal was to repel Sui forces before retreating to the Salsu River, where the Goguryeo had set a trap. The river had been blocked, allowing the Sui to join the shallow water. When they did, the Goguryeo breached the dam and drowned a large number of Sui men. The remainder were readily vanquished. ¹⁾

Beginning in 1931, Japan conquered Chinese territory. The Chinese made repeated attempts to free themselves. The Japanese Imperial Army invaded farther into China in 1937 in order to suppress Chinese nationalism. Wuhan, China's second largest city at the time, was crucial to the uprising. Through air supremacy, Japan scored a decisive victory, killing or capturing the majority of Chinese ships and aircraft. Their ground troops, on the other hand, were mostly intact, although the Japanese army suffered significant losses. The Chinese army was then able to contribute to Japan's defeat in World War II. ²⁾

The Battle of Kiev was one of the USSR's worst defeats of the war. Soviet forces were stationed near Kiev on the Southwestern front. The troops stationed at the front were crucial to German forces, but they were concentrated on pushing towards Moscow. When Hitler discovered that the Soviet troops in Kiev were in trouble, he shifted his forces from Moscow to Kiev. The German forces surrounded the Soviet troops, cutting off supplies and reinforcements. Thousands of Kiev citizens were killed in bombing raids. ³⁾

Most people know this conflict as D-Day, which is commemorated every year on June 6. In 1940, France surrendered to Germany. By 1943, the United States had entered the war. The Allies were preparing to launch an invasion of Nazi-occupied territory. They started the operation by targeting German airfields and manufacturing facilities. Later, amphibious craft assisted by fighter planes and naval guns landed on the beaches of Normandy. Within two months, the majority of the German soldiers had been captured or murdered. ⁴⁾

This clash is regarded as the decisive war that resulted in the unification of all Chinese states. Zhao was one of the most powerful nations still fighting against Qin, which controlled much of western China. All other competitors had been defeated by the Qin. In terms of military strength, there wasn't much of a difference between the two. The Qin general, on the other hand, duped the Zhao into a trap, separating their soldiers into two controllable divisions. The Zhao surrendered after 46 days. ⁵⁾

Throughout the history of France, the city of Verdun has served as a significant military bastion. It is located on the Meuse River and is flanked by several forts and a citadel. The German army believed it could conquer the Meuse Heights, a high elevation from which to launch an artillery attack on the city. ⁶⁾

The Allied forces (British and French) had already decided to strike German fortifications on the River Somme when the German army launched its offensive on Verdun. As a result, while defending their positions at Verdun, the French were unable to deploy the promised men to the offensive. As a result, the British troops were overrun on the first day. They lost little more than 57,000 men. ⁷⁾

This was a pivotal fight in the European war against Nazi Germany. It led to the collapse of Berlin and the suicides of Adolf Hitler and members of his staff. Hitler had ordered troops to hold out against Soviet forces in Hungary earlier in the year. German ground forces were weakened as a result of the attempt. The Soviets would launch a land attack on Berlin, while the Allies would contribute some air power. ⁸⁾

This was the largest fight of World War II and the largest combat in history. The conflict involved about 2.2 million troops from both sides, with about half of them dying (there were significant civilian casualties in the battle). Stalingrad was a major industrial center in the construction of armaments and transportation down the Volga River. On its banks, the city was established. Germany thought it was critical to conquer the city. Their attack began with air attacks and progressed to the ground. ⁹⁾