Mentoring Task Force One (MTF-1) was a combined arms battle group formed by the Australian Army for deployment as part of Operation Slipper during the War in Afghanistan.

The 750-strong combined arms battle group consisted of infantry, engineers, cavalry, artillery and logistic elements from 55 different units, but was primarily based on the 6th Battalion, Royal Australian Regiment (6 RAR).

Initially commanded by Lieutenant Colonel Jason Blain, MTF-1 formally took over responsibility for the area of operations (AO) from Mentoring and Reconstruction Task Force Two in February.

[5] While attached to MTF-1, soldiers from Combat Team Delta (based on D Company, 6 RAR) took part in heavy fighting during the Battle of Derapet in Deh Rahwod on 24 August 2010, sustaining one killed.

[7] On 20 November, the task force marched through Brisbane's central business district along with other deployed units from the 7th Brigade, as the returning soldiers were officially welcomed home in the biggest such parade since the end of the Vietnam War.