On battle cries and dying screams

Fear causes voice pitch to rise. 

West Papua Tribal War (from Dead Birds (1964) by Robert Gardner)

Man Describes Surviving an Indian Battle in 1868 - Wild West - Enhanced Audio

Rare Footage of Civil War Veterans Doing the Rebel Yell

DEATH WHISTLE

War of the Worlds (1953) - main battle scene in English (in full)

The scream at the 3:14 mark of the above video is what a dying scream sounds like.