There is a bug in the alliance war battle arena, causing an “Unexpected error” and restarting the app (sending you back to your home base ui).
- during an ongoing war, tap an opponent and select “Attack”
- tap “enemy info” - the enemies heroes and troops will be displayed
- tap on one of the troops to see their description. This causes the error.
In summary: you cannot view troop details from the enemy team in the war battlefield.