Large Battle Crash

The game crashes on large battles. I'd like to fix this.
Did you see an error-message, or did the game just close?
Thank you for any help!

I attacked with 350 miliz and it did not crash

I've never seen an army of 350 :-)
I'm glad to hear, the game did not crash.

It seems to me while I was playing that if I make more than 4 farmers than it starts to glitch and slow down badly.

That's weird. On my dual core laptop (code2duo) I have no problems to deal with 100 farmers. On my low performance Windows RT tablet, the game starts lagging at 50 farmers. Lagging at 4 farmers is absolutely not acceptable. I'll do my best, but it's hard for me to find the reason because on my side it works fine.

I attacked with about 7 arches, 2 rams, 2 siege towers, 16 swordsman, 47 knights and 30 guys with pitchforks and it crashed

I frequently have lag and crashes with large battles. It has to do with computer power. I play on tablet mostly. However i agree with a better computer even 300 archers wont lag. Farms is my problem thought with about 30 farmers per field.