The Imperial Guards Division commenced its march south from Changhua on 3 October. On 6 October the division's advance guard defeated a force of 3,000 insurgents at Talibu. On 7 October the division fought an important action with the insurgents at Yunlin, driving them from a series of fortified positions. On 9 October the division fought the second-largest battle of the campaign, the Battle of Chiayi, to storm the walled city of Chiayi, where the insurgents had decided to make a determined stand. According to report, the Chinese and Formosans numbered 10,000 men and included both regular and volunteer units. The true figure was probably around 3,000 men, but the insurgents were stiffened by a force of 600 Black Flags, who now fought the Japanese for the first time during the campaign, and also deployed cannon and machine guns on the city walls. After a preliminary bombardment with their mountain artillery the Japanese scaled the walls and broke into the city. The insurgents were defeated, leaving over 200 dead on the field. Total casualties in the Imperial Guards Division in the engagements fought between 3 and 9 October were 14 killed and 54 wounded. The division was ordered to halt at Chiayi and wait until Prince Fushimi's northern expedition went ashore at Pa-te-chui before resuming its advance.