Complex sentence: Wavell reconnoitred East Africa in January 1940 and the theatre was added formally to his responsibilities, he expected that the Somalian colonies could be defended with minor reinforcement and that if Italy joined the war Ethipoia would be invaded as soon as there were sufficient troops.
Split into simpler sentences: Wavell reconnoitred East Africa in January 1940 and the theatre was added formally to his responsibilities. He expected that the Somalilands could be defended with minor reinforcement and that if Italy joined the war Ethiopia would be invaded as soon as there were sufficient troops.