who won at the end of it?
The Japanese.
Battle of Pasir Panjang
The fall of Bukit Chandu allowed Japan access to the Alexandra area, indirectly contributing to the Alexandra Hospital massacre.

Adnan Saidi is described by many Singaporeans and Malaysians today as a hero for his actions on Bukit Chandu – he encouraged his men not to surrender and instead fight to the death. In Singaporean and Malaysian school textbooks, he is also credited as the soldier who noticed the error in the marching style of the Japanese soldiers disguised as Indian troops.

what developments have taken place that led to modern day singapore river UNANSWERABLE which colonial power has ruled here? Britain. which wars have they faced in the past? Battle of Pasir Panjang. when did it happen? 12 to 15 February 1942. between whom did it take place? Between the Allied forces and volunteers of Singapore's population and the Japanese. what arrangements were done before the war? The 1st Malaya Infantry Brigade was tasked with defending the approach to the Pair Panjang Ridge. THe 44th Indian Brigade were positioned on their right. A Malay platoon was responsible for the British defenses at Bukit Chandu. where did the war take place? Pasir Panjang. were there any fatalities? The Malay casualties were estimated at 159 whereas the same was unclear for the Japanese.
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Battle of Pasir Panjang [SEP] Aftermath
The fall of Bukit Chandu allowed Japan access to the Alexandra area, indirectly contributing to the Alexandra Hospital massacre. Adnan Saidi is described by many Singaporeans and Malaysians today as a hero for his actions on Bukit Chandu – he encouraged his men not to surrender and instead fight to the death. In Singaporean and Malaysian school textbooks, he is also credited as the soldier who noticed the error in the marching style of the Japanese soldiers disguised as Indian troops. Fighting continued after his death and the subsequent British signing of surrender of Singapore to the Empire of Japan at 1810 hours on 15 February 1942 in the area around Alexandra Hospital, Tanjong Pagar and Pulau Belakang Mati (Sentosa) where some of the Malay Regiments regrouped.