Real question: How to counter this ATGM fired from 5 km away?
https://www.reddit.com/r/CombatFootage/comments/tj8n9h
Asking infantry to scouts around every 5 km is improbable. By the time infantry near the tank hear the sound, they're already doomed.
Get something like Trophy APS.
Btw, how about to convert all of infantry formation in the Army into Mechanized infantry and motorized ones, equipped with MBT, AFV, APC, IFV infantry mobility vehicles and MRAP. Just looking at increasing firepower distribution and lethality among units around our peer (including neighbor army) this Made infantry by foots is more vulnerable than ever.
For now, TNI AD having at least 21 infantry brigade units (outside of independen battalion infantry) if each of them have at least three infantry battalion, thus they are in command of about 63 battalion infantry. And to convert them all into Mechanized infantry, each battalion need at least 40-50 APC/IFV/IMV/FSV and dozens of fuel truck, transport truck and munition truck. Thus the number needed at least 2520 to 3150 armored vehicles and between 756 to 1512 logistic truck.
Motorized yes, mechanized probably no. Mechanized units are very maintenance-heavy and have a high operating cost. Not to mention the logistical issues, fuel and parts aren't easy stuff to work with. For motorized, we should really standardize logistical dan transport trucks all across the military, which will tremendously simplify the logistical system.
The issue with the Infantry, which made up the bulk of the Army. Is that historically, mobility and vehicles are the exceptions rather than the rule in regard to the Infantry and the Army in general. Take for example German Army in WW2, despite being famous for their mechanized warfare, most of the Army was transported by horse in off-road conditions (if not on-foot). Having a fully motorized Army is a luxury that even most WW2 great powers were unable to enjoy, that is why the American Army was impressive due to them being able to supply their extremely high fuel consumption.
Fuel consumption is a big issue for Indonesia, because, despite the fact that we are an oil-producing nation, our civilian fuel consumption exceeds our production capacity. So most fuels are reserved for your everyday Honda Beat and Toyota Avanza, rather than for Leopards or Renault trucks. For prolonged war, this will pose a problem, because fuel reserved for the military will be limited, yet at the same time limiting civilian consumption will potentially tank the economy. Also in war, the fuel supply chain will definitely be disrupted, imports from the middle east will probably be blockaded and inter-island shipping will be difficult. So basically there needs to be a coherent logistics strategy for Indonesia, a lot of reforms, and serious observance on this matter.
There is some alternative for transportation though. For example, the Germans and the Soviets, relied on
railways to transport troops and equipment across. Cheaper, more economical, faster, predictable, and reliable form of transportation to deploy troops to the frontline. From 1870 up to Today, railways become the life-saving carriage of Armies around the world and have proven to be the more reliable choice for a non-American military. Russian army prior to the Invasion, relied on railways to transport troops to the border, and that stuff is the only thing preventing them from f*cking up worse than what already is. Without railways, we can see that their logistics breaks down really quickly and that the matter becomes very complicated as the war progressed. What happened in the war, is due to the problem with a motorized army in general, and the advantage of railways in particular.