The 29th Army of China, which experienced many battles, was formally incorporated into the Northeast Army by Chiang Kai-shek himself in 1930, and Jong Zhang Xueliang appointed Song as his teacher. Its predecessor was the famous Northwest Army with Feng Yuxiang as its commander in chief. Before the Nanjing government was integrated with the local military forces such as the Northeast Army, the Northwest Army, the Jin Army and the Jiangxi Army, it was a powerful military force outside the directly affiliated army. After being incorporated by the central government, it was also a very important defensive circle in China's action against Japanese imperialism.

The July 7th Incident in Lugouqiao began in 1937, and the Japanese invaded China for eight years. In hundreds of bloody battles to defend the country, Zhang Zizhong, the commander of the 38th Division of 29 army, is famous at home and abroad for his achievement of "Better conquered people than conquered people". The famous broadsword team in 29 army used this broadsword as an important weapon in night raids, hand-to-hand combat and "Ma bu" or horse stance just look.

"Sword to the devil, brothers of the 29th Army, the day of War of Resistance against Japanese Aggression has come ..."

The original words of the song "Sword March" are inspired by the story of 29 army's night attack on the Japanese army in xifengkou, the Great Wall. Later, with its majestic melody resounding through the military and civilians throughout the country, Brothers of the Twenty-ninth Army was changed to Brothers of the National Armed Forces.