There is no such thing as an average battle. battles, campaigns and wars are individual events and bear no relation to each other.
Nor is there a set ratio of how many knights fight in a battle.
There would have been far fewer knights in the Battle for El Alamein than the Battle of Agincourt for instance.
about 300
Depends on the battle
Which natives, what country, what battle
about 23000
20000
1778
There were over 23,000 men killed, wounded, or missing after the end of the Battle of Antietam.
201
Alot
seven
alot
100