Troop capacity question

[ZenDen]

Hi everyone!
I was attacked by 14 armored personnel carriers 2, but how is this possible if they occupy 12 places? 14 * 12 = 168, but the maximum troop capacity is 155.
I have seen a study that reduces the required number of seats for a Heavy Tank. Are there other similar studies at the University or Library for other troops, or maybe there are other opportunities somewhere else?
Thanks!

 

[ZenDen]

I found the answer in the description of the game on the Internet. "Standing Army" at the Library and Sun Tzu's research at the University may help.

And yet, maybe there are still opportunities to reduce the number of places for other troops than the Heavy Tank?

 

[King Crimson]

What nation was the attacker? The Romans have increased troop capacity even before any research.

 

[ZenDen]

What nation was the attacker? The Romans have increased troop capacity even before any research.

By the way, yes, attacker is Rome.