I disagree completely. Now this works in some situations, but if you're playing the more technologically advanced nation, you do need those ports and that infra a lot more than your enemies need. In low infra situation even basic infantry can stand their ground against low-supply tanks. By destroying the infra you're actually hurting your own offensive with very little gain.
Striking at logistics does work sometimes when there's clear supply bottleneck you can hit. Like bombing down the port an invasion is using as their beachhead. I would never bomb infra in Asia if I'm going to conquer that region - it's just going to hurt my troops more and cause more attrition.
Tbh in your example you have like twice their numbers and complete technological superiority. You would've probably got identical results even without any strat bombing. With relatively small nation like Siam bombing the infra doesn't however backfire as bad as it could, but if you're for example bombing Chinese or Soviet infra, you're going to hurt your advance in the long run.
I agree with what you said. Basically, I am just using Siam as a testing ground to "practice" my carpet bombing strategy. I am definitely aware of the possible supply problem, so I always check before I advanced. Basically, cheesy as it may sounds, I am just a bit inspired by American strategy of overwhelming fire and advance. I believe they used this a lot in their campaign against Germany in Normandy and Japanese in Pacific islands, even though they had COMPLETE air and artillery superiority. They would call upon powerful artillery and air strikes on enemy positions ahead, before the infantry advances. In Normandy, the infrastructure was damaged so badly that Germany had difficulty reinforcing their defensive perimeter around beachhead.
Also, if you looked at the green and red bar below Erwin Rommel, you will notice that the odds were roughly equal. In an attack on entrenched position, you need a 3:1 odds for a swift and successful attack. Even though Siam has less troops than me, at this late-game stage, they have maxed out their techs and their divisions are probably buffed up (40 combat width). Their soft attack is probably 500 and above, defense wise, the stat is probably at least 1000. So, yes, good to soften them up.
How to soften them up? CAS is one. Destroying their IC so they have difficulty reinforcing troops with lost equipment, easy for me to overcome their entrenched positions. Of course, this may be an overkill. But isn't that is how America has fought their war? Against Iraq, Vietnam and Japan, they have relied on their superior firepower to break up enemy lines.
Edit: In fact, I made an effort to make sure my tech is up to date. I only use a small number of powerful jets to do the damage. All my troops are also equipped with most modern weapons. They are not too many with crude technologies, like China and Russia.
Meanwhile, you can choke the enemy supplies with submarines.
