The troops in "Empire: Total War" play an important role, so they need to upgrade the troops. If they want to upgrade the troops quickly, they need to eliminate a large number of enemies with low losses. The whiteboard soldiers are replenished, so their experience will be diluted, and the level will be reversed. If you want to upgrade a team of soldiers specifically, you cannot use them to fight hard battles.
How to quickly upgrade the Imperial Total War Force
The specific troops you want to upgrade must eliminate a large number of enemies at a low loss. The ones who replenish the troops will be replaced by whiteboard soldiers, so their experience will be diluted, and the level will be reversed. If you want to upgrade a team of soldiers specifically, you cannot use them to fight a tough battle.
If you practice guards with recruitment restrictions, you can defeat the capital of a major country. Ordinary unrestricted soldiers will use lower level 1 soldiers to supplement the first-level soldiers with losses of 50% + 1 soldiers to supplement the full staff. If you have less than half of the remaining soldiers, you can also replace them with level 2 soldiers.