UFC 18: The Road To The Heavyweight Title was a mixed martial arts event held by the Ultimate Fighting Championship on January 8, 1999 in New Orleans, Louisiana. The event was seen live on pay per view in the United States, and later released on home video.

The event featured a UFC Lightweight Championship (now known as the Welterweight Championship) bout and six other bouts. UFC 18 was technically part two of what the UFC called "The Road To The Heavyweight Title", a tournament, spanning four events, held to crown the new UFC Heavyweight Champion after the title was vacated by Randy Couture (due to contract disputes).

Part one was held at UFC Brazil, with Tsuyoshi Kosaka taking a win to advance to UFC 18. UFC 18 featured the first US appearance of MMA legend Bas Rutten, and the first appearance of the late Evan Tanner, who would go on to become the UFC Middleweight Champion.

Sebastiaan "Bas" Rutten (Dutch pronunciation: [ˈbɑs ˈrʏtən]; born February 24, 1965) is a retired Dutch mixed martial artist, Karate and Taekwondo blackbelt, and kickboxer. He was a UFC Heavyweight Champion, a three time King of Pancrase world champion, and finished his career on a 22 fight unbeaten streak (21 wins, 1 draw). He is currently the star of Punk Payback on Fuel TV and co-host of Inside MMA on HDNet.

As a fighter, one of his favorite tactics was the liver shot (both punch and kick), and he popularized its use in MMA. Rutten is known for his charisma and has capitalized on his celebrity since retiring from fighting in 1999. He has worked as a color commentator in several MMA organizations, including Pride, and has appeared in numerous television shows, movies, and video games. He also coaches MMA and has authored several instructional materials.

Rutten was born in Tilburg, Netherlands and developed from the age of 6 a skin disease, named eczema, and severe asthma. Because of the skin disease he always had to wear long sleeves, turtle necks and gloves to protect him from showing his skin, his asthma made him very skinny and because of all this he was bullied on a daily basis as a kid. Rutten found refuge in climbing trees at a forrest behind his house, when bullies would chase him, he would climb in a tree and could swing from tree top to tree top, which made it impossible for bullies to follow pursued.

Tsuyoshi "TK" Kohsaka (高阪 剛, Kōsaka Tsuyoshi^?, born March 6, 1970) is a retired Japanese mixed martial artist. He has competed in notable mixed martial arts promotions like the Ultimate Fighting Championship, RINGS, and Pancrase. He holds notable wins over Kimo Leopoldo, Mario Sperry, Volk Han, Gilbert Yvel and Egan Inoue. He is notable for being the first man to defeat and TKO Fedor Emelianenko. Kohsaka is known for his conditioning and grappling prowess as well as fighting many of the greatest heavyweight and light heavyweight fighters of all time. His "TK guard" is famous for its efficiency and Frank Shamrock and Maurice Smith have both credited him with having vastly improved their work from that particular position.

Tsuyoshi Kohsaka was an early MMA pioneer, who started his career in the Rings Organization frequently having to fight each and every month. He won the prestigious Lumax Cup tournament, beating out the likes of Akihiro Gono and Egan Inoue. During his career at Rings, Kohsaka defeated former UFC Heavyweight champion Maurice Smith, Gilbert Ivel, Chris Hasseman, and Fedor Emelianenko.

Ronda Rousey (born February 1, 1987) is an American judoka and mixed martial artist and the current Strikeforce Women's Bantamweight Champion. She has finished all of her opponents by armbar in the first round. She formerly trained at the Olympic Training Center in Wakefield, Massachusetts under guidance of Jimmy Pedro and is now part of Team Hayastan in Santa Monica, California.

Rousey trains under Gokor Chivichyan and Edmond Tarverdyan of the Glendale Fighting Club in Glendale, CA. Rousey also trains with Leo Frincu and Gene Lebell, along with Team Hayastan fighters such as Manny Gamburyan, Karen Darabedyan, Sako Chivitchian and Sevak Magakian. She is managed by Darin Harvey of Fight Tribe MMA.

Rousey is currently the #1-ranked pound-for-pound female MMA fighter in the world by MMARising.com, and is ranked #1 at 135 pounds and #2 at 145 pounds according to the Unified Women's MMA Rankings.

At just 17, Rousey qualified for the 2004 Olympic Games in Athens, becoming the youngest judo player in the entire Games. Also in 2004, Rousey won a gold medal at the 2004 World Junior Judo Championships in Budapest, Hungary.

Miesha Tate (pronounced /ˈmiːʃə/; born August 18, 1986) is a professional mixed martial artist. She is the former Strikeforce Women's Bantamweight Champion and the current Freestyle Cage Fighting Women's Bantamweight Champion. She has also competed and won a silver medal in the FILA Grappling Championships.

Tate is currently the #6-ranked pound-for-pound female MMA fighter in the world by MMARising.com and the #3-ranked 135-pound female fighter according to the Unified Women's MMA Rankings.

Tate wrestled on the boys' wrestling team in high school. In 2005, she won the high school women's state championship and went on to win nationals at the World Team Trials in the 158 lb division.

While attending Central Washington University Miesha's colleague, Rosalia Watson, encouraged her to attend the mixed martial arts club with her. Soon after attending, Tate officially joined the mixed martial arts sport club at Central Washington University that was run by her current boyfriend and trainer, Bryan Caraway. She amassed a 5-1 amateur record in MMA before turning pro.