What was a canal from Chang Jiang River to Guangzhou used to supply troops?

The canal from the Chang Jiang River to Guangzhou is known as the Grand Canal. It served as a vital waterway for transporting grain and other supplies to support troops and sustain military campaigns throughout Chinese history. The canal facilitated efficient logistics and communication between northern and southern China, enhancing the ability to mobilize resources during times of conflict. Its strategic importance contributed to the stability and expansion of various dynasties.