Complex sentence: Maxwell was a war correspondent for the London "Standard", covering the Anglo-Egyptian victory at Battle of Omdurman (1898), and reporting extensively throughout the Second Boer War (1899-1902).
Split into simpler sentences: Maxwell was a war correspondent for the London "Standard", covering the Anglo-Egyptian victory at Battle of Omdurman (1898). He forwarded reports to London from South Africa throughout the Second Boer War (1899-1902).