The TDF–OLA joint offensive was a rebel offensive in the Tigray War and the OLA insurgency starting in late October 2021 launched by a joint rebel coalition of the Tigray Defense Forces (TDF) and Oromo Liberation Army (OLA) against the Ethiopian National Defense Forces (ENDF) and government.

The TDF and OLA took control of several towns south of the Amhara Region in the direction of the Ethiopian capital Addis Ababa in late October and early November.

[2] On 5 November, the TDF and OLA announced a wider coalition, including seven smaller groups, that they named the United Front of Ethiopian Federalist and Confederalist Forces.

[11][12] The EDF, which had strongly supported the ENDF in earlier phases of the Tigray War, appeared to be absent from late October/early November fighting.

According to French historian and Horn of Africa expert Gérard Prunier, this is because the bulk of the Eritrean army in Tigray was defending the border with Sudan (to prevent Tigrayan rebels from potentially being supplied by Egypt, an opponent to Abiy Ahmed's government) and protecting Eritrea's own border with Tigray, thus leaving the defense of Addis Ababa down mostly to Amhara militias in the face of heavy losses sustained by Ethiopia's federal army.

[16] On 25 November, the TDF was approaching Debre Sina and federal prime minister Abiy Ahmed announced that he would travel to the battlefront.

[19] According to Sveriges Radio, by late November, OLA had "surrounded" Addis Ababa from the west, south and south-east, and was in coalition with the TDF in the north-east.