You don’t even need 5000 years. Colonial forces regularly beat 10:1 odds against natives, and they very obviously lived at the same time. The battle of Ulundi saw the british win with 20 deaths, against a force of 15.000 Zulu warriors. Even the famous British defeat at Islandlwana saw the Zulu impi suffer tripple the British casualties.
A lot actually if you really compare the technologies, also the romans could haveeasily beat any army 5 times their size from 5000 years before.
You don’t even need 5000 years. Colonial forces regularly beat 10:1 odds against natives, and they very obviously lived at the same time. The battle of Ulundi saw the british win with 20 deaths, against a force of 15.000 Zulu warriors. Even the famous British defeat at Islandlwana saw the Zulu impi suffer tripple the British casualties.