I've gotten no responses in 24 hours, so I'm withdrawing the question.
The cliff, which admittedly doesn't look particularly red in the picture, is the traditional site of the Battle of Red Cliffs, also known as the Battle of Red Bluffs or the Battle of Chibi, in 208 AD. This is the battle where the southern warlords Liu Bei and Sun Quan defeated the northern warlord Cao Cao, preventing him from becoming the master of the entire Han Dynasty. This was the decisive fragmentation of the Han Dynasty, and eventually, after the puppet Han emperor was deposed by Cao Cao's son Cao Pi in 220, led to the Three Kingdoms period.
One story goes that Cao Cao's army was on the north side of the Yangtze and was inexperienced at naval warfare. Liu Bei's advisor Zhuge Liang (the gentleman in the picture) set a spy, Pang Tong, into Cao Cao's camp where he posed as a military advisor. Pang Tong advised Cao Cao to chain the shiips of his fleet together, so the army would not get seasick and panic, and basically be able to fight as if they were on land. When Cao Cao protested that this would leave his fleet vulnerable to fire ships, Pang Tong told him that the wind only blew from the northwest that time of year.
Cao Cao chained his ships, the wind shifted, Sun's navy launched their fire ships, and Cao Cao's fleet was incinerated with most of his army. The southern forces then easily defeated the remnants.