The Grand Duke’s New Daughter-In-law is a Little Fierce

I used to be an invincible special forces operative. But when I reincarnated, I woke up as a five-year-old kid in another world?!
And to make matters worse, I’m destined for a tragic end?
Now reborn as a little girl, no, the literal baby Ludia! I have to rewrite my doomed fate and secure my own happily ever after.
Armed with my unbreakable military discipline…
Make the impossible happen!