Complex sentence: Some Belgian officials viewed hostilities in East Africa as an opportunity to expand Belgian holdings in Africa; the capture of Ruanda and Urundi could increase the bargaining power of the De Broqueville government to ensure the restoration of Belgium after the war.
Split into simpler sentences: Some Belgian officials viewed hostilities in East Africa as an opportunity to expand Belgian holdings in Africa. And the capture of Ruanda and Urundi could increase the bargaining power of the De Broqueville government to ensure its restoration after the war.