On this day, 99 years ago, on August 18, 1926 (July 11, 1926, the Northern Expedition Army captured Tingsi Bridge and Hesheng Bridge. After the Northern Expedition Army occupied Changsha, it continued the Northern Expedition. On August 15, 1926, Chiang Kai-shek held a military conference in Changsha to implement the second phase of the Northern Expedition and decided on the strategy of advancing troops: with the Fourth, Seventh and Eighth Armies as the Central Army, heading straight to Wuhan and blockading Wusheng Pass. The Second and Third Armies were on the right wing and were gathered in the areas of You County and Liling to monitor the enemy forces in Jiangxi and take offensive defense. The 9th and 10th Armies, newly formed from the troops of Qian Army generals Yuan Zuming and Wang Tianpei, served as the left wing, concentrated in Jinshi and Li County, invaded Shashi and Jiangling, and eliminated the enemy in western Hubei. The First and Sixth Armies are the general reserve forces and advance with the Central Army. On August 18, Chiang Kai-shek issued a declaration to discuss Wu. The declaration said: "Now the National Revolutionary Army will fight a decisive battle with Wu Peifu, the Beiyang orthodoxy, in Jianghan. This war will not only determine the fate of the warlords, but also whether China's country and nation can restore its freedom and independence." "In the past, the Grand Marshal showed that our purpose of the Northern Expedition was not only to overthrow the warlords, but also to overthrow the imperialism on which the warlords relied for their survival. Not only did he overthrow Cao and Wu, but he also made no one who succeeded Cao and Wu. Now that Wu Peifu has created chaos and evil deeds, he has reached a high level. His party has a revolutionary plan and the government has a plan for self-defense. Both have no choice but to send troops to attack the thieves." On August 18, the Northern Expedition Army began a general attack and drove all the enemies on the front of the Yaluo River that day. Li Zongren led the Fourth and Seventh Armies of the Central Right Column to organize death squads to attack the enemy and shake the enemy's front. Ye Ting's Independent Regiment and another part of the Fourth Army crossed the Luoluo River, followed the mountain path, and surrounded the enemy in a roundabout manner. They concentrated several times the enemy's strength to launch a fierce attack, quickly destroying Lu Yun's command headquarters. Lu Yun committed suicide after occupying Pingjiang City on the 19th. The Northern Expedition Army took advantage of the victory and advanced along the mountain path from Pingjiang to Yuezhou. The light troops quickly circled behind Yuezhou and cut off the enemy's retreat. Yueyang was captured on the 22nd, and the Battle of Hunan ended. On August 23, the National Revolutionary Army Headquarters decided to use the Fourth, Seventh and Eighth Armies to attack Tingsi Bridge in three routes. Tingsi Bridge is south of Wuchang, about 60 kilometers away from Wuchang. The terrain is dangerous and easy to defend but difficult to attack. It is surrounded by water on the east, west and north sides, and the eastern mountains are built with solid fortifications. There were more than 20,000 enemy troops guarding Tingsi Bridge, commanded by Song Dapei. The Fourth Army set out from Tongcheng on the 24th and occupied Zhonghuopu Station on the 25th to control the Yuehan Road. The Seventh and Eighth Armies also gathered near Zhongpu to coordinate. On the morning of the 26th, all departments began to attack the enemy position at Tingsi Bridge. As the enemy relied on natural danger to defend itself and waited for help, the Northern Expedition Army charged more than ten times in a row, resulting in heavy casualties. The headquarters decided to transfer Ye Ting's Independent Regiment, which served as a reserve force. On the 27th, the Independent Regiment, led by local farmers, circled behind enemy lines along mountain paths and launched an onslaught while the enemy was unprepared. The enemy soldiers were in chaos, and the Northern Expedition Army captured Tingsi Bridge. In this battle, more than 1,000 enemy troops were wiped out and 157 enemy officers were captured. There were 2296 soldiers and 4 artillery pieces, 9 machine guns and 1600 rifles were seized. The Northern Expedition Army killed 134 people and injured 256 people. After the Battle of Tingsi Bridge, the Independent Regiment took advantage of the victory to pursue the enemy to Xianning, and more than 10,000 enemy people fled to Hesheng Bridge. On August 28, Wu Peifu also personally led reinforcements from Wuchang to Hesheng Bridge to supervise the battle, preparing to occupy the city and resist stubbornly and prevent the Northern Expedition Army from advancing. The Northern Expedition Army took advantage of the fact that the enemy's foothold was not stable and began to act on the evening of the 28th. After fierce fighting, Yanglindang, Taolinpu and other places were captured. At 2 o'clock on the 29th, the former enemy headquarters of the Northern Expedition Army decided to command the attack on Hesheng Bridge by Li Zongren, ordering the Fourth and Seventh Armies to take the main attack. The Seventh Army was responsible for attacking the enemy east of Hesheng Bridge, and the Fourth Army advanced along the area west of the railway line, attacking Hesheng Bridge head-on and approaching Wuchang. The Eighth Regiment of the Eighth Army and the Second Division of the First Army were the general reserve forces, advancing with the Fourth Army. The Fourth Army used Zhang Fakui's 12th Division and Ye Ting's Independent Regiment as attack teams. On the morning of the 29th, the attack team advanced from Xianning to Henggou Bridge. They fought hard with the enemy for a day and night, and suddenly attacked the enemy's central front. At 12:00 on the 30th, the revolutionary army all occupied Hesheng Bridge. The National Revolutionary Army killed 140 people and injured 357 people; 159 enemy officers and 2386 soldiers were captured, and 20 artillery pieces, 9 machine guns, and 1847 rifles were captured. At this point, the door to Wuhan was opened. On the 31st, the Northern Expedition army arrived at the foot of Wuchang City. Some weapons seized during the Battle of Tingsi Bridge