サダ・スマトラFC

Karo United was declared on 28 July 2019 in Medan City by a board led by the initiator and the club president Arya Mahendra Sinulingga. This club was founded with the aim of being a new force for football in North Sumatra.

In their debut season in the Indonesian football league, Karo United managed to win the 2019 Liga 3 North Sumatra zone after defeating PS Bhinneka with a score of 5–2 and advancing to the Regional Round. In the regional round, Karo United managed to beat PSLS Lhokseumawe with an aggregate score of 3–2. With this result, they advanced to the 2019 Liga 3 National Round. However, Karo United had to stop in the round of 16 after losing on penalties to Persidi Idi Rayeuk. That way, their dream of promotion to Liga 2 had to run aground.

On 17 June 2021, Arya Mahendra Sinulingga has resigned from his position as president club and his position was given to Theopilus Ginting who previously served as manager club. The position of manager left by Theopilus Ginting was later held by Yosephine Sembiring.

After 3 years they established and played in the Liga 3 North Sumatra zone and the national round, in the 2021–22 season, they qualified for the semifinals of the league and automatically qualified for promotion to Liga 2 next season. And in the final match, they managed to become champions in Liga 3 this season after beat Putra Delta Sidoarjo on penalties which ended with a score of 4–2.

Karo United officially changed its name to Sada Sumut. The name change was declared at the PSSI Ordinary Congress which was held on 28 May 2023 in Jakarta. The reason for the name change is related to the history of the struggle of the Karo people for Indonesian independence. The word "Sada" means "one" in Batak Karo language, the name Sada Sumut itself means that this team represents all of North Sumatra.