 The invasion began on 22 September <unk> . Prince <unk> was the commander @-@ in @-@ chief of the invasion force ; his deputies were Vice Governor <unk> , and commander <unk> <unk> . The <unk> armies marched to the border in two columns . One column advanced along the <unk> River using over 200 boats ; the other proceeded by land and joined the first column at the <unk> fort at <unk> . The <unk> chronicles report an overwhelming number of <unk> forces laying siege to the fort although their numbers are greatly exaggerated . ( The chronicles say that the <unk> army numbered 400 @,@ 000 men while the <unk> army numbered 20 million men and 6 million horses . ) The <unk> withstood the siege for over two months but the fort fell on 3 December <unk> . 
