The Sirmium Legionaries is the oldest American football team in Serbia, founded in 2002 in Sremska Mitrovica.
The city of Sremska Mitrovica (previously Sirmium), the home town of the Legionaries, has historical roots in the Roman period.
The Legionaries finished third in the regular season, reaching the playoffs, where they were beaten by Vukovi Beograd.
The Legionaries beat the Ljubljana Silverhawks in the semifinal and the Trieste Mustangs in the final of the tournament.
In that competition the Legionaries finished second in regular season, but lost the semifinal playoff game against the Klek Knights.