system
Given the following post, respond as if you're commenting on Reddit:
human
[Fallout] How did the NCR beat the Enclave and BoS?

I mean, they wear power armor that basically makes you into a walking tank, but were defeated by an army wielding conventional weaponry.
gpt
Numbers, mostly. Power armor is great and all but a walking tank still gets taken out by enough guys with anti-tank missiles. The Brotherhood also made a number of strategic errors, such as the Battle of Helios One, that caused them losses disproportionate to their strength. Other times they made the opposite mistake and willingly ceded defensible territory to the NCR; holding territory was never the main objective, so they undervalued it.