In 1936, after capturing the three northeastern provinces of China, Rehe Province and eastern Mongolia, the Japanese army continued to show its fangs into the Chinese mainland. In November, Japan supported King De and other Mongolian separatists to launch the Suiyuan Campaign, under the leadership of General Fu Zuoyi, our heroic 35th Army, rose up against the Japanese invaders, and with the support of Chiang Kai-shek and Jin Suijun, at the end of December, defeated the puppet army in the area of Bailing Temple, and thwarted the Japanese conspiracy.

On the afternoon of July 7, 1937, the 8th Squadron of the 3rd Brigade of the 1st Wing of the Japanese North China Garrison Army, led by Captain Setsuro Shimizu, drove to the area between Huilongmiao and Dayao, which was close to the Chinese garrison at Lugou Bridge. At 7:30 p.m., the Japanese army began the exercise. At 22:40, the Japanese army claimed that gunshots were heard in the exercise area and that a soldier (Kikujiro Shimura) was "missing", and immediately forcibly asked to enter Wanping City, the garrison of the Chinese garrison, to search, but the 219th Regiment of the 110th Brigade of the 37th Division of the Chinese 29th Army sternly refused. The Japanese army took the opportunity to launch a military operation. At about 5 o'clock in the morning of July 8, the Japanese army suddenly launched an artillery bombardment, and the headquarters of the Chinese 29th Army immediately ordered the officers and soldiers on the front line: "Ensure the Lugou Bridge and Wanping City", "The Lugou Bridge is the grave of Er, and it should live and die with the bridge and not retreat." "The 3rd Battalion of the 219th Regiment, which guarded Lugou Bridge and Wanping City, rose up to resist under the command of regiment commander Ji Xingwen and battalion commander Jin Zhenzhong.

After the Japanese army provoked the July 7 Incident, it caused strong repercussions throughout the country. On the second day of the July 7 Incident, the Central Committee of the Communist Party of China sent a telegram to the whole country, appealing: "Compatriots of all China, Pingjin is in danger! North China is in danger! The Chinese nation is in danger! Only when the whole nation carries out the war of resistance is our way out! And put forward the idea of "not allowing Japanese imperialism to occupy an inch of China!" "Shed the last drop of blood to defend the homeland!" A loud slogan. Chiang Kai-shek put forward the principles of "not yielding, not expanding" and "not seeking war, but fighting the war". Chiang Kai-shek sent a telegram to Song Zheyuan, Qin Dechun (deputy commander of the 29th Army and mayor of Beiping City) and others, "Wanping City should be held and not retreated", and "Lugou Bridge and Changxindian must not be lost".

On July 17, 1937, Chiang Kai-shek made a speech in Lushan, pointing out that "the Lugou Bridge Incident has reached the last moment of retreat" and that "there is no chance of compromise, and if you give up the size of land and sovereignty, you will be the sinner of the Chinese nation through the ages." "For the 29th Army, which bravely resisted the enemy in the battle of Lugou Bridge, all walks of life throughout the country expressed warm support. People from all over the country have organized groups to send letters of condolence and condolences to them; Pingjin students organized field service regiments to the front line to rescue the wounded and transport ammunition; Residents in the Lugouqiao area delivered water and food to the troops, and carried military supplies; The railway workers of Changxindian quickly made air-raid shelters and dug gun holes on the city wall to assist the army in holding Wanping City; The Federation of Overseas Chinese also sent a telegram to encourage the 29th Army to make persistent efforts. After the outbreak of the 77 Incident, the Japanese attack was met with stubborn resistance from the Chinese army. Seeing that the attempt to occupy the Lugou Bridge could not be realized, the Japanese army played up a conspiracy of "on-the-spot negotiations"; on the one hand, they wanted to use the negotiations to pressure the Chinese side to comply, and on the other hand, they used the name of negotiations to gain time to deploy troops.

On 9, 11, and 19 July, the agreements reached three times between the Japanese garrison in North China and the Jicha authorities were proved to be dead letter by the intermittent artillery fire at the Lugou Bridge. The "on-the-spot negotiations" enabled the Japanese army to gain time to increase its troops in North China, but it blinded the eyes of the Jicha authorities, delayed the preparations of the 29th Army to respond to the battle, and brought great harm to the Pingjin War of Resistance. By July 25, 1937, more than 60,000 Japanese troops had been massing in Pingjin. After the operational arrangements of the Japanese garrison in North China were basically completed, they deliberately created the Langfang Incident and the Guanganmen Incident on 25 and 26 July in order to find a new pretext for further launching a war of aggression against China.

On the afternoon of the 26th, the North China garrison issued an ultimatum to the 29th Army, demanding that the Chinese defenders withdraw from the Pingjin area by the 28th, otherwise they would take action. Song Zheyuan sternly refused, and on the 27th, he issued a telegram to the whole country to defend himself and defend the territory, resolutely defending the land and resisting the war. On the same day, with the approval of the emperor, the Japanese General Staff ordered the Japanese North China Garrison Army to launch an attack on the 29th Army, transfer about 200,000 people from five domestic divisions to China, and issued an official combat mission to the commander of the North China Garrison Army, Kazuki Kiyoji: "Responsible for the crusade against the Chinese army in the Pingjin area." "A bloody war is no longer inevitable. The Chinese army then rose up to resist, staining the Pingjin Road with blood, and the strong men repaid the hatred of the country.

On the morning of July 28, 1937, the Japanese army launched a general attack on Beiping as planned. At that time, the 20th Division of the Korean Army, which had been gathered around Beiping, the 1st and 11th Brigades of the Kwantung Army, and the infantry brigade of the Chinese Garrison Army, about 10,000 people, launched an all-out attack on the 132nd, 37th, and 38th Divisions of the Chinese 29th Army stationed in the suburbs of Beiping, with the cooperation of more than 100 artillery pieces and armored vehicles, and the cover of dozens of aircraft. The officers and men of the 29th Army rose up to resist in their respective stations and composed an unyielding battle song. Nanyuan was the focus of the Japanese attack. More than 8,000 troops of the 29th Army stationed in Nanyuan (including more than 1,500 students of the Military Training Corps trained in Nanyuan) resisted bloodily, Tong Linge, deputy commander of the 29th Army, and Zhao Dengyu, commander of the 132nd Division, were martyred, and many students of the Military Training Corps also sacrificed their young lives in the battle.

On the night of the 28th, Song Zheyuan evacuated Beiping, and on the 29th, Beiping fell. In the early morning of the 29th, Zhang Qingyu, captain of the 1st Corps of the Jidong Security Corps, and Zhang Yantian, captain of the 2nd Corps, launched an uprising in Tong County, resisting the Japanese anyway, killing hundreds of people including Hosogi Shinumakasa, the head of the Tong County secret service, and capturing the traitor Yin Rugeng alive.

On July 29, 1937, the 38th Division of the 29th Army, under the leadership of Deputy Division Commander Li Wentian, launched the Battle of Tianjin. The 38th Division attacked the Japanese troops at Tianjin Railway Station, Haiguang Temple and other places, and won a large number of troops, but was heavily bombed by Japanese planes and suffered heavy casualties, so it was ordered to retreat. On the 30th, Tianjin was lost.

On September 18, 1937, the Military Commission ordered Li Yutang: "The 3rd Division will be concentrated in Nanchang, Jiangxi, and wait for transportation." After receiving the order, Li Yutang immediately held a combat meeting in the conference room. Li Yutang looked at the regiment commanders and brigade commanders below, and said in a deep voice: "Usually, they are clamoring to resist Japan one by one, but now that the Japanese army has launched the 7.7 Incident, and the Japanese invasion of China has become a fact, it is time for our generation of soldiers to be shrouded in horse leather; Speaking of this, Li Yutang stood up and tidied up his clothes, and read aloud, "Order!" ”

"Huh!" All the participating officers collectively stood upright.

"The Military Commission ordered the Third Division to concentrate in Nanchang and wait for transportation! Complete! Li Yutang read out the order of the Military Commission aloud; The starving officers were still standing solemnly, waiting for the order of the division commander.

"I order that all brigades, regiments, and divisions directly under the troops cancel all holidays from now on! The officer handles all matters related to the departure of the camp and must be ready for departure within 24 hours! After Li Yutang finished speaking, he motioned for everyone to sit down!

"This time to the north to resist the Japanese, you must be ready to sacrifice your life on the battlefield, this is different from the domestic banditry, it is a national war against foreign enemies! If someone is afraid of death, he will have diarrhea on the battlefield; Chief of Staff, my guard battalion will send a company to you as a supervising team, including me, to retreat without order, and there will be no mercy for killing! Li Yutang said ruthlessly,

"Yes, Commander!" Ruan Yongqi replied loudly,

"Okay, don't be nervous, now give you half a day to arrange your family and say goodbye to your family! In the evening, everyone must return to the camp. Let's go to the meeting! Li Yutang ordered the meeting to be dissolved;