That sounds like a set question from school or college. :)
If you read it, you can pick up quite a lot about this particular battle ~ but that may or may not reflect 'war and how it was fought' for others in other situations.
This poem tells how this battle was fought ~ with a bit of poetic license. It states that it was fought on horseback. It talks about weapons and noise. Also about the way soldiers have to simply obey orders, etc.
If you read it and make notes on descriptions and descriptive phrases, etc, you should find a decent answer for yourself :)
I have, actually, written two similar hubs on this subject, so have a read of both.
Let me know if this helps :)