After Italian operations in Sudan at Kassala and Gallabat in June, Churchill blamed Wavell for a "static policy". Anthony Eden, the Secretary of State for War, communicated to Wavell that an Italian advance towards Khartoum should be destroyed. Wavell replied that the Italian attacks were not serious but went to Sudan and Kenya to see for himself and met Ethiopian Emperor Haile Selassie at Khartoum. Eden convened a conference in Khartoum at the end of October 1940 with Selassie, South African General Jan Smuts (an advisor to Winston Churchill), Wavell, Lieutenant-General William Platt and Lieutenant-General Alan Cunningham. A plan to attack Ethiopia, including support for Ethiopian irregular forces, was agreed. In November 1940, the British gained an intelligence advantage when the Government Code and Cypher School (GC & CS) at Bletchley Park broke the high grade cypher of the Italian Army in East Africa. Later that month, the replacement cypher for the was broken by the Combined Bureau, Middle East (CBME).