How did you get Bronze?

Wondering if anyone is Bronze and if so what did it take to get there. The lowest I have seen is Silver. Does Bronze even exist?

One of my friends has bronze 1 in breakout. We were in a party with 2 other friends and we all died laughing, because it’s the first time we ever saw a bronze. Btw he sucks big time at Halo.

For some reason on lunch day and in the first two hours ALL my levels started bronze ???