Complex sentence: The ground also hosted sporting events including Australian Rules Football games until the 1940s when it was used as a base for the Z Special Unit of the Australian, British and New Zealand armed forces for their 1943 raid on Japanese occupied Singapore harbour.
Split into simpler sentences: The ground also hosted sporting events including Australian Rules Football games. It was used during the 1940s when it was used as a base for the Z Special Unit of the Australian, British and New Zealand armed forces for their 1943 raid on Japanese occupied Singapore harbour.