Talking bout Chi bi...ok...i will just say the story...The Battle of Red Cliffs unfolded in three stages: an initial skirmish at Red Cliffs followed by a retreat to the Wulin battlefields on the northwestern bank of the Yangtze, a decisive naval engagement, and Cao Cao's disastrous retreat along Huarong Road.
The combined Sun-Liu force sailed upstream from either Xiakou or Fankou to Red Cliffs, where they encountered Cao Cao's vanguard force. Plagued by disease and low morale due to the series of forced marches they had undertaken on the prolonged Southern Campaign (de Crespigny 2003), Cao Cao's men could not gain an advantage in the small skirmish which ensued, so Cao Cao retreated to Wulin (north of the Yangtze River) and the allies pulled back to the south.
Cao Cao had moored his ships from stem to stern, possibly aiming to reduce seasickness in his navy, which comprised mostly northerners who were not used to living on ships. Observing this, divisional commander Huang Gai sent Cao Cao a letter feigning surrender and prepared a squadron[2] of capital ships described as mengchong doujian (蒙衝鬥艦).[3] The ships had been converted into fire ships by filling them with bundles of kindling, dry reeds, and fatty oil. As Huang Gai's "defecting" squadron approached the midpoint of the river, the sailors applied fire to the ships before taking to small boats. The unmanned fire ships, carried by the southeastern wind, sped towards Cao Cao's fleet and set it ablaze. Within a short time smoke and flames stretched across the sky, and a large number of men and horses either burned to death or drowned (Chen c. 280:54.1262-63).
Following the initial shock, Zhou Yu and the allies led a lightly armed force to capitalize on the assault. The northern army was thrown into confusion and was utterly smashed. Seeing the situation was hopeless, Cao Cao then issued a general order of retreat and destroyed a number of his remaining ships before withdrawing (Chen c. 280).
Cao Cao's army attempted a retreat along Huarong Road, including a long stretch passing through marshlands north of Dongting Lake. Heavy rains had reduced the track to a thick mire, making the road so treacherous that many of the sick soldiers had to carry bundles of grass on their backs and use them to fill the road, to allow the horsemen to cross. Many of these soldiers drowned in the mud or were trampled to death in the effort. To the misery of Cao Cao's army, the allies, led by Zhou Yu and Liu Bei, gave chase over land and water until they reached Nan Commandery (南郡). Combined with famine and disease, this decimated Cao Cao's remaining forces. Cao Cao then retreated north to his home base of Ye, leaving Cao Ren and Xu Huang to guard Jiangling, Yue Jin stationed in Xiangyang, and Man Chong in Dangyang (Chen c. 280).
The allied counterattack might have vanquished Cao Cao and his forces entirely. However, the crossing of the Yangtze River dissolved into chaos as the allied armies converged on the riverbank and fought over the limited number of ferries. To restore order, a detachment led by the allied general Gan Ning established a bridgehead in Yiling to the north, and only a staunch rearguard action by Cao Ren prevented further catastrophe (Eikenberry 1994:60; de Crespigny 2007:239).
Analysis
A combination of Cao Cao's strategic errors and the effectiveness of Huang Gai's ruse had resulted in the allied victory at the Battle of Red Cliffs. Zhou Yu had previously observed that Cao Cao's generals and soldiers comprised mostly cavalry and infantry, and few had any experience in naval warfare. Cao Cao also had little support among the people of Jing province, and thus lacked a secure forward base of operations (Eikenberry 1994:60). Despite the strategic acumen Cao Cao had displayed in earlier campaigns and battles, in this case he had simply assumed that numerical superiority would eventually defeat the Sun and Liu navy. Cao's first tactical mistake was converting his massive army of infantry and cavalry into a marine corps and navy: with only a few days of drills before the battle, Cao Cao's troops were ravaged by sea-sickness and lack of experience on water. Tropical diseases, to which the southerners had long been immune, also plagued the soldiers of the north with the debilitating effects of sickness rampant in Cao Cao's camps. Although numerous, Cao Cao's men were already exhausted by the unfamiliar environment and the extended southern campaign, as Zhuge Liang observed: "Even a powerful arrow at the end of its flight cannot penetrate a silk cloth" (Military Documents 1979:193).
The uncharacteristically poor preparation and miscalculations displayed by Cao Cao during this campaign may have been partly due to the recent death of his strategist and advisor Guo Jia. Cao Cao himself had commented: "Had Guo Jia been with us, I would never have got into such trouble" (Chen c. 280:14:433). Another key advisor, Jia Xu, had recommended after the surrender of Liu Cong that the overtaxed armies be given time to rest and replenish before engaging the armies of Sun Quan and Liu Bei, but Cao Cao disregarded the advice (Eikenberry 1994:60). Cao Cao's own thoughts regarding his failure at Red Cliffs suggest that he held his own actions and misfortunes responsible for the defeat, rather than the strategies utilised by his enemy during the battle: "…it was only because of the sickness that I burnt my ships and retreated. It is out of all reason for Zhou Yu to take the credit for himself." (Chen c. 280:54:1265).