Key Facts
- Duration
- 9 March – late April 1997 (~7 weeks)
- Key objective
- Capture of Yei and SAF garrison towns in Equatoria
- Yei encircled
- 11 March 1997
- External supporters (SPLA)
- Uganda, Ethiopia, Eritrea (covert expeditionary forces)
- Outcome for WNBF
- Effectively destroyed as an active fighting force
Strategic Narrative Overview
The SPLA, covertly reinforced by expeditionary units from Uganda, Ethiopia, and Eritrea, launched the offensive on 9 March 1997. Yei was encircled within two days. A retreating column of WNBF fighters, SAF troops, FAZ soldiers, and ex-Rwandan Armed Forces personnel attempting to flee Zaire into Yei was ambushed and destroyed by the SPLA. Yei fell shortly after. The rebels then pushed further, capturing additional towns across Equatoria through late April 1997.
01 / The Origins
During the Second Sudanese Civil War, the Sudanese government used towns in Western and Central Equatoria, especially Yei, to supply Ugandan insurgents—the WNBF and UNRF (II)—operating from Zaire. The First Congo War had already driven these pro-Sudanese forces from Zaire, with the SPLA fighting alongside Uganda and the AFDL. This cleared the Zairian border and created a strategic opening for an SPLA offensive into Equatoria.
03 / The Outcome
The offensive ended in a clear SPLA victory. Several SAF garrison towns were captured, the Sudanese government's grip on its southern territories was significantly weakened, and SPLA influence in Western Equatoria expanded considerably. The WNBF suffered crippling losses and was rendered ineffective as a fighting force. The operation raised international awareness of the South Sudanese rebel cause and positioned the SPLA for further anti-government campaigns.
Belligerents & Mobilization Analysis
Side A
3 belligerents
Side B
3 belligerents
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.