To the southeast of Longling, on both sides of the Yunnan-Burma Highway, a series of hills are lined up from north to west: Menglian Slope, Guanglin Slope, Snake Waist Slope, etc. Mountains and mountains are connected, winding and undulating, extending to the Fangmaqiao River and entering the territory of Mangshi. This is the outer barrier of the Longling, and only by occupying the various hills can you condescend and overlook the Longling.

The battle to conquer the outer barrier of Longling had already started at the same time as the battle of Huangcaoba.

On June 6, the 263rd Regiment of the 88th Division crossed the Yunnan-Burma Highway from Dapingzi and launched an attack on Menglianpo on the right side of the Yunnan-Burma Road. This Menglian slope tightly chokes the Huangcao Dam on the Yunnan-Burma Road into the main section of Longling, and is an important pass to guard Longling. Here, the Japanese pillboxes were strong, and at the same time, when the trenches were everywhere, although the troops in Longling City were empty, Xiaobao Zhongzuo still arranged a squadron of troops to wait here, and the fortifications in this place were hidden.

The 263rd Regiment rushed here on a rapid march, and did not have time to reconnoiter the terrain, so it hurriedly launched an attack, and as a result, it fought for 3 days and did not capture Menglianpo.

The regiment commander Fu Biren was in a hurry, and the Hunan soldier who graduated from the 6th phase of the Army Military Academy was ruthless, flicked his arm, and personally led the troops to rush up, and the soldiers who were charging in front were shot by the Japanese machine guns and fell, and the Japanese army's hidden fort was also exposed.

"Get on the bazooka!" Commander Fu shouted, the first battalion pounced, one blasting was unsuccessful, and the second batch quickly pounced. The first battalion finally reached the Japanese fortress in the rain of bullets and successfully completed the blasting. At the cost of more than 500 casualties in the whole regiment, the 263rd Regiment of Menglianpo took Menglianpo at the cost of more than 500 casualties in the whole regiment, and at the same time, after 9 repeated battles, it blew up 3 pillboxes of the Japanese army and the regimental commander Fu who commanded the charge was also seriously wounded.

After the fierce battle of Menglianpo, the 264th Regiment of the brother troops quickly approached Guanglinpo.

On the evening of June 7, when the rain was pouring down and it was pitch black, Regiment Commander Dai Hairong made a decisive decision, fought continuously, and attacked Guanglinpo at night. In fact, the fierce gunfire of Menglianpo had already reached Guanglinpo, but after several days of fierce fighting, the Japanese troops in Guanglinpo were paralyzed, and they thought that it would be difficult for the expeditionary force to break through Menglianpo for a while, and Guanglinpo was temporarily worry-free.

At night, the rain and wind were fierce, and the 264th Regiment quietly touched the Japanese position, which caught the Japanese troops in Guanglinpo by surprise. The attack was fought so neatly that most of the Japanese soldiers saw their emperor in their sleep, except for a small number of Japanese troops who fled down the mountain in the dark.

The 264th Regiment took advantage of the victory to advance and then attack the old Dongpo.

This old east slope is nearly 3,000 meters above sea level, and it is the most steep mountain outside Longling City. The mountain has steep walls, and the only relatively flat woodland on the top of the mountain is just high in all directions. This is the center of several mountains in the north and south of the suburbs of Longling, and it is also an important barrier for the Japanese army to defend Longling City.

On the 8th and 9th, it rained heavily for two consecutive days, making the already steep mountain road even more difficult, and the white fog in the mountain recesses between the mountains was filled, making it difficult for the artillery to display their talents, and the 264th Regiment could only organize a hard attack by the commandos.

The Japanese occupied a high place, guns and bullets were fired from overhead, the fire network was dense, and the 264th Regiment did not defeat several organized strong attacks.

This kind of hard sacrifice was too great, and the regiment commander Dai Hairong quickly adjusted his tactics, organized the assault team again, and took advantage of the darkness to quietly touch the top of the mountain from the east side of the old Dongpo, ready to take the devil by surprise.

This is the weakest point of the old eastern slope. In the face of the 264th Regiment attacking from Guanglinpo, the Japanese army made every effort to strengthen the vigilance in the direction of Guanglinpo, neglecting that there was a backbone leading to Sunjia Mountain on the mountainside on its east side, and neglecting the precautions on this side.

Commander Dai specially ordered all the soldiers participating in the sneak attack to sleep for three hours in order to prevent sleepiness at the beginning of the night raid.

At about 10:50 p.m. that night, Regiment Commander Dai immediately woke up all the soldiers of the 264th Regiment who were sitting on the ground around him to participate in the sneak attack, and then issued each of them a large blade.

On the night of June 10, the moon was dark and the wind was high, and the night was temporarily calm. After the team was assembled, Commander Dai led the soldiers with a large blade, and the team sneaking on the ridge from Sunjia Mountain to the old eastern slope was swallowed up by night.

It took about an hour for Regiment Commander Dai to lead the soldiers to the front of the Japanese position, and what made him feel extremely happy was that the Japanese soldiers who stayed on the position may have fought too fiercely during the day, and in the middle of the night, they all fell asleep on the ground one by one.

Even if more than a dozen Japanese soldiers were responsible for patrolling and guarding the position, they all walked up three or five steps, and they couldn't help dozing off......

"Rush, brethren! Pick up the big knife in your hand and slash at the little Japanese devil's head! He immediately led more than 400 soldiers behind him, and while rushing to the position of the Japanese troops in great strides, he shouted loudly in his loud voice.

More than 400 soldiers of the 264th Regiment who followed behind Commander Dai, each holding a large blade in their hands, rushed to the position of the Japanese troops.

The dozen or so Japanese soldiers who were in charge of the guard and patrol on the position were still dozing off just now, and when they saw a large number of Chinese soldiers rushing from the front of the position, they were immediately awakened and attacked with bayonet-mounted Type 38 rifles.

Under normal circumstances, according to the operational requirements and regulations of the Japanese troops, the Japanese soldiers in charge of patrolling should sound the signal flares they carry once they discover the enemy situation, so as to alert the main Japanese forces on the position and prepare for battle.

However, due to the suddenness of the incident this time, the dozen or so Japanese soldiers who were in charge of patrolling the periphery of the position did not have time to sound the signal flares they carried, and they engaged the Chinese soldiers who rushed forward one after another, and after they were cut down to the ground, they were trampled to death by a large number of Chinese soldiers who rushed forward, which was really both relieving and funny.

At this time, it was already past twelve o'clock in the night, and the Japanese soldiers who had been fighting all day had already been sleeping in the camp where they were staying overnight, so as to recuperate their spirits and prepare for the battle that was coming tomorrow.

As a result, these Japanese soldiers never expected that they had only slept for an hour or two when they heard many Japanese soldiers being slashed and screaming one after another.

The 264th Regiment of Lianke Liangshan pressed down from a high place, and its momentum was like a tiger, and the Japanese army could not parry, so they had to flee to Longling Dam.

The 264th Regiment took advantage of the victory to pursue, and went straight to Fengjia, Wenchang Palace and other places on the edge of Longling City.

In a few days, Song Xilian's troops quickly attacked the outskirts of Longling, the two main forces of the 71st Army had captured the high ground on the outskirts of the city, and Longlingba fell into the encirclement of the 71st Army.