Exactly right.So for a scenario let’s say I am upgrading a stack of ten level level one infantry, and want to get them to level three instead. Let’s assume it takes two hours for them to upgrade to level two. First I make sure I have plenty of resources, enough to upgrade the units by the time I want to. I wait for the research to be an hour from completion. Then I upgrade the units, which will take two hours. In a hour I finish infantry level three research, and in another I have infantry level three rather than two, saving time and resources.
You can time your whole army around these upgrade chains. Especially powerful when a unit research arrives early for a doctrine, like Axis subs level 3 on day 4. You can quickly produce a superior force that outclasses anything the enemy can deal with. Use this technology advantage to sink their navy, or shoot down their air force, which can win you the war.
CarKing the 6th