I don't really like using the word "victory" because the branches of science aren't really competing with one another. I think it's usable, but it seems like an awkward fit.
Another phrase you could use instead is latecomer to the dance. That phrase is used when someone or something gets started later than the others, but still ends up in a shining or prominent position. M-W defines latecomer as:
someone or something that has recently arrived or become involved in something
As an example usage, a 2006 report on auto manufacturing compares Hyundai with companies like Honda and Toyota, and reads:
Hyundai, the latecomer to the dance, single-mindedly pursued quality by copying the Japanese quality model.
So, you could say something like this:
Insofar as my love of the sciences goes, biology was a latecomer to the dance.