Complex sentence: Accounts of white Southern Rhodesian soldiers' wartime experiences started to be published in the 1920s; their service became a key entry in many national histories, though the role played by black troops was often minimalised in these accounts.
Split into simpler sentences: Accounts of white Southern Rhodesian soldiers' wartime experiences started to be published in the 1920s. The conflict became a key entry in many national histories, though the role played by black troops was often minimalised in these accounts.