Its different from sino-jap and russo-jap war, why? Because Singapore is just a city-state, a Kabupaten sized country.
This city size country could swell to a 1-2 million strong army if need be. They have an active conscription (NS men).
Its still possible for Japan to fight against Russia and China, but for Singapore to fight against Indonesia and winning (by forcing Indonesia to enter negotiation table) Singapore will need lots of plot armor to do that.
I don't think so, Batam is quite vulnerable...there used to be a map shared on the internet on how in times of war, Singapore will expand their perimeter to include Batam and Johor (if Malaysia is somewhat involved). Batam is quite realistic to be taken, as its proximity is so close and we only have like a battallion size garrison there.
RSAF and RSN could make a huge quarantine zone in the areas above and surrounding SG and Batam, isolating the local garrison from receiving any help from outside, this is a realistic scenario.
With only 20km separating Batam and SG, whatever force we station there will be vulnerable to their artillery and air strike, and once wiped out, the Singaporean army could ferry 2-3 battallions worth of troops with the landing ships and even more troops ferried by air using their heavy lift helicopters. Once Batam is secured, that means more terrain to position their SAM, or even additional airfield like Hang Nadim to launch up their jets.
And in this scenario there's really only the negotiations table left to us if we want that chunk of land to be returned.
Even if Singapore manages to cause massive damages to our military and we only able to exert a tiny amount of our real power can they still withstand that damage?
I don't get it, if the navy and air force is decimated there's really no means from our side to harm them. Unless we plan for a million man swim.
And if Singapore manages to unleash its full military power will it be enough to bend our knee? Suppose that Jakarta is decimated and completely destroyed and so what? it's not like we don't have any other places to retreat, as for Singapore? Live or death they only have their little red dot.
Explain "bend our knee" ?...The Indonesian state will still exist, children will still go to school, mothers will still spend their money in the market, life in many parts of Indonesia will still go as usual, but the cost to our military and political standing both in terms of money and prestige is down by a lot. War will likely be limited surrounding SG, Batam, Tj Pinang and Riau.
As I said before , winning wars doesn't always = opposing side total capitulation.
In Greco-Turkish war of 1912, the immidiate effect of Ottoman losing to the Greeks in the battle Elli, doesn't meant the destruction of Istanbul and the fall of the Ottomans.