- The book Federation: The First 150 Years gives the spelling of Kuan's family name as "Le".
In the year 2031, Lee helped to strengthen the Eastern Coalition (also known as the ECON), an alliance of Asian nations politically opposed to the United States of America and its allies. By 2051, Lee held the rank of general in the ECON armed forces, at which point he overthrew the emerging democracy. He launched an attack on the Americas, joined by the Pacific nations. (TLE novel: The Sundered; TOS novel: Dreadnought!, ST reference: Federation: The First 150 Years)
- The TOS novel The Rings of Time establish that the Eastern Coalition had been around in some form since at least the year 2020; which conflicts with other, later sources. It is possible that it was restructured into its final configuration circa 2031 by Lee Kuan, leading into the events of World War III some 24 years later, which would be more consistent with canon-based historical facts.
Spock mentioned Lee along with Ramses II, Julius Caesar, Alexander, Napoléon Bonaparte, and Adolf Hitler to show that Earth history was full of men seeking absolute power. (TOS episode: "Patterns of Force")
Fleet Captain Garth of Izar boasted to Captain James T. Kirk that as Master of the Universe, he would go much farther, and have more success than other previous despots, such as Lee Kuan, Alexander the Great, Caesar, Napoleon Bonaparte, Adolf Hitler, and Krotus. (TOS episode: "Whom Gods Destroy")