The Battle of Kranji was the second stage of the World War II Battle of Singapore. On 9 February 1942 the Japanese assaulted the north-western front of the British colony of Singapore. Their primary objective was to secure a second beachhead after their successful assault at Sarimbun Beach on February 8, in order to breach the Jurong-Kranji defence line as part of their southward thrust towards the heart of Singapore City. Defending the shoreline between the Kranji River and the Johor-Singapore Causeway was the Australian 27th Brigade, led by Brigadier Duncan Maxwell, and one irregular company.
On 10 February the Japanese forces suffered their heaviest losses while moving up the Kranji River, which caused them to panic and nearly aborted the operation. However, a series of miscommunications and withdrawals by Allied forces in the ensuing battles allowed the Japanese to swiftly gain strategic footholds, which eventually led to the fall of Singapore on 15 February 1942. The terrain around Kranji was primarily mangrove swamps and tropical forest intersected by streams and inlets. The shoreline between the Kranji River and the Johor-Singapore Causeway, nearly four kilometers long, was defended by the Australian 27th Brigade, led by Australian Brigadier Duncan Maxwell.