Final answer:
Emus were not historically considered formidable opponents in war due to their ground-dwelling nature and limited flight abilities.
Explanation:
In ancient times, emus were not known for being formidable in war due to their nature of spending most of their time on the ground and having limited flight abilities. Meanwhile, armies that relied on speed and mobility like the Mongols or Arab forces utilizing camels and horses gained tactical advantages in warfare.
Learn more about Emu's formidability in war here:
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