General Platt's activities

General Platt's force had advanced to Amba Alagi in May 1941. He had been totally occupied in those operations until then. Now, a small force had been made available:

2/6th King's African Rifles
Composite Battalion of the Sudan Defence Force
a Belgian unit from the Congo:
  a headquarters
  5th Infantry Regiment of two battalions
  a company of heavy mortars

These troops had operated in "The Blue Nile" region in March 1941. The Belgians and 2/6th KAR "had taken Gambela". They waited while General Cunningham advanced and greatly pressed the remaining Italians. General Platt sent the Belgians to the attack, and this caused the Italian commander to ask for a cease fire south of the Blue Nile. The Italians surrendered on 6 July. This is based on the account in Vol.II of the Official History.