Good morning mikey1871, first of all let me express that I am really enjoying all the comments exchange between you and tigeriii

. So many questions and inquiries are in my opinion a good enrichment in order to understand in a much better way many aspects of this new HoI2 expansion!
And now concerning this specific thread, you began it above asking about
ESE... Therefore let me copy here the following text obtained from the HOI2 wiki (
http://www.paradoxian.org/hoi2wiki/index.php )
Please, take into account that the following describes ESE in relation to HOI2 vanilla (another question is to determine how many modifications create AoD and IC). Nevertheless I hope this explanation will help you anyway if you are trying to improve your game basic knowledge!
Kind regards from Spain!
What is Effective Supply Efficiency (ESE)?
The Supply Efficiency number is calculated once a day at midnight and is the base number for any supply efficiency calculations for that day for your divisions. This Average Supply Efficiency number is combined with the infrastructure value in each province for each division to produce an Effective Supply Efficiency for that corps/division. ESE has a combat effect and also potentially affects unit speed, upgrading progress, organization gain and the reinforcement rate. While your TC has some overall effects, each corps does it own separate ESE calculation and this ESE calculation has direct effects.
Many postings are about TC when they should instead focus on ESE as shown below. It is possible to have no TC problems by being under your TC capacity while some of your divisions will still have ESE problems due to being in low-infrastructure provinces.
ESE will be discussed first, and then TC, though mostly they are so intertwined that discussing one means having to discuss the other as well.
How is ESE Calculated?
When you click on a corps, ESE is shown in the line between the province name and the list of divisions in the corps. When you wait for the tooltip rollover, you see a calculation that averages the overall Supply Efficiency base number with the infrastructure of the province where the division is deployed in. Any Headquarters’ ESE bonus is added to that average.
Example of tooltip details showing an ESE of 93.03 percent:
Average Division ESE: 100.00
Infrastructure: 76.06
HQ Bonus: 5
(Average 100.00 + Infra 76.06)/2 = 88.03
+ HQ Bonus 5.00
------------------------
ESE 93.03
mikey1871, in the previous mentioned wiki you can also find interesting descriptions concerning the following questions...:
How does ESE affect combat?
What can I do if my divisions have low ESE?
How much does Offensive Supply Cost?
What other immediate steps can I take to increase my ESE?
What are the strategic considerations for better TC and ESE?