Bowanpo

The Battle of Bo Wan Po is known as Zhuge Liang's first battle. An army led by Xiahou Dun went to attack Liu Bei, who was at the time on the outskirts of Shu, which was under the hands of his cousin at the time. While Liu Bei was outnumbered greatly Zhuge Liang's tactics. Basically Zhuge Liang lured Xiahou Dun into a forest and set it on fire and ambushed the panicking army. Due to the panic of the Wei army, Liu Bei's forces won fairly easily.

Historical Information
Historically, this battle's ambush was planned by Liu Bei as Zhuge Liang had not joined Shu yet.