A screenshot featured on the Age of Empires box and used in marketing for the game. The art team carefully staged the scene in the game's scenario editor then captured it in action.

My new book includes a chapter on how Microsoft and Ensemble put together the packaging (including predictable MS in-fighting over branding) and how they marketed the game. https://www.kickstarter.com/projects/gabedurham/age-of-empires-how-ensemble-studios-made-history/