Fighting in the Battle of Medan, he was promoted to the Commander of Battalion I Regiment II of the TRI (Republic of Indonesia Armed Forces) in Tanjungbalai and also selected as Chairman of the Regional Struggle Bureau XXXIX East Sumatra.

Djamin was forced out of North Sumatra under the Renville agreement to Kutacane, Central Aceh Regency, where he continued to raid and harass Dutch military posts and convoys until the war ended After the Dutch–Indonesian Round Table Conference.

Where Lt. Col. Djamin Ginting became the deputy commander of Kodam I/Bukit Barisan fighting against Darul Islam forces led by Daud Beureu’eh in Aceh.

[5] During a rebellion under Major Boyke Nainggolanan, loyal to the PRRI movement at Medan, North Sumatra, Djamin Ginting launched Operation Bukit Barisan, on 7 April 1958.

[3] During the aftermath of the 30th September Movement coup, Djamin Ginting was brought back from a post in Aceh and became inspector general of the Indonesian Army.