Survival battles

Survival battles are battles where your objective is to survive as much as possible, up to 5 waves, the reward increases with every wave, there is currently 2 types of survival battle, they reward pounds in high ammounts, with other rewards such as orders components and science, at start you are given some deployment points and then you are given more as you survive more waves, at the end of each wave, the troops ammo is refilled, the two types of battles are

Hills
in this kind of survival battle you will fight against Prussian empire (if you are Prussia you will still have Prussia as enemy), its the easiest of both survival battles but its a bit less rewarded

First wave:
The first wave has multiple regiments of line infantry, light infantry, and cavalry regiments, they come in varying numbers and position

Second wave:
In the second wave, multiple regiments of Black corps premium infantryman and possibly chasseurs will arrive, varying numbers and position

Third wave:
In this wave the attackers will include premium black corps, but also national regiments of Prussian grenadiers, along with regular cannons, varying numbers and position

Fourth wave:
The fourth wave is a massive cavalry charge by Prussian Black hussars and other cavalry regiments, adviced to deploy infantry with wall of bayonets perk in front, varying numbers and position

Fifth wave:
The fifth (and last wave) wave has all kinds of attackers, cavalry, grenadiers, black corps and many light infantry its the hardest of all, varying numbers and position

Rewards:
45-65 pounds, 4-6 science, order components, some silver

Plains
Plains is the second kind of survival, its harder but better rewarded, you fight against the Russian empire and if you are Russia the enemy will still be the Russian empire

First wave:
some premium Preorazhensky and Semyonovsky regiments will attack, along with some regular troops

Second wave:
more premium preobrazhensky and semyonovsky regiments will attack, less regular troops

Third wave:
More premium troops spawn, cavalry will attack and some regular dragoons

Fourth wave:
Russian premium dragoons will attack, along with many infantry (premium) and cavalry, they will bring Life guard grenadiers

Fifth wave:
many Russian premiums of all kinds will attack, including Line infantry, cavalry, dragoons, grenadiers and light infantry, you may require orders at this wave to not get overwhelmed by the enemy quality and quantity, and its hard to hold them off with the amount of deployment points you get

Rewards: around 75 pounds most of the times, and a decent ammount of science, along with lots of order components