The 35th Division of the Republic of China 103 Brigade fought bloody battles in Suixi for two days and nights, with thousands of casualties, and the location was about Wula Naobao.

1939 at the turn of summer and autumn, there were about 30,000 Japanese Sakamoto divisions, equipped with cars, armored vehicles and tanks. Under the command of Colonel Kuroda, they invaded Suixi from Baotou in two ways. All the way to the 8 1 military defense zone in Ubulangkou, Siyitang, Ulan Aobao and Wuzhen; On the other hand, at Ma Qi Ferry, we attacked Meng Bingyue's 7th Cavalry Division.

Before the Japanese army reached the position of the 35th Division of 8 1 Army, it bombarded the positions of the 206th and 205th Regiments of Wulanbao with artillery. The 206th mortar company also responded with 82 mortars. However, as soon as the 206th mortar smoked, it was discovered by the Japanese army. The enemy immediately poured more than 200 shells at the position of the 206th artillery regiment, and the 206th artillery regiment fired only three shells, and was silenced by the enemy artillery. Under the cover of artillery and machine guns, the Japanese army rushed to the 8 1 Army position with tanks, armored vehicles and cars. The officers and men of the 8th1Army used fortifications to keep calm, develop firepower and attack the enemy according to the orders of the Chief of Staff Ma Mijing. When the enemy entered the effective range of the 8 1 military rifle and was getting off the bus to prepare for the attack, the officers and men of the 206th regiment 1 battalion launched a fierce charge, rushed to the enemy's motor vehicle at one fell swoop, and started hand-to-hand combat with the enemy, cutting the tires of the enemy's car with a big knife and surrounding the enemy. Some enemies were killed in the car before they got off. Some of the enemies who got off the bus were killed, some were injured, and the rest fled into cars and armored vehicles. According to Wang Wudian's memory of this battle, after the battle, "our army seized two cars, shells 100 rounds, dozens of boxes of bullets, several guns, command knives, canned food and other military supplies. This time it was discovered on the battlefield that the enemy used a special device on the armored vehicle to turn the body of the Japanese aggressors killed by our army into a car. 8 1 Army drove the car that captured Japanese devils to Wuyuan County to show publicity to the masses. Celebration slogans written by ordinary people are pasted on the whole car body layer by layer, which fully embodies the national feelings of the people who love the motherland, hate the enemy and are consistent with the army and the people. There is an old artist in Wuzhen Street. Within a few days after the victory of 8 1 Army, he made up many songs and played and sang them in the street. The lyrics are as follows:' our old western army (referring to 8 1 army) can really fight. The Japanese soldiers were beaten away, and the seized cars were pulled into Wuyuan City, and the whole city celebrated and welcomed them. Only by relying on our old Western Army to defeat the Japanese soldiers can the people have peace. "

In the Battle of Ulan Aobao, Ma was able to resist tenaciously, launched hand-to-hand combat with the enemy, dealt a heavy blow to the enemy, effectively stopped the Japanese puppet troops from advancing westward, shattered the Japanese army's battle plan of occupying Ningxia and Northwest China, and effectively curbed the Japanese army in North China.

In this battle, the 8 1 Army lost more than 1000 people and many light and heavy weapons.