Complex sentence: When the British began to transfer equipment to the site from Dar-es-Salaam on the dirt road, they pushed through the Ruvu River and encountered large numbers of hungry wildlife, including lions and crocodiles.
Split into simpler sentences: When the British begun to transfer equipment to the site from Dar-es-Salaam they had to use a dirt road. They pushed through the Ruvu River and encountered large numbers of hungry wildlife, including lions and crocodiles.