This isn't supposed to be a "canon" correct timeline. It's based off of the books, but also on what I want to be true.
YBF = "Years Before Firestar". It works like BCE and CE.
While Rusty's birth is extrapolated from ITW, we don't meet Princess until FAI.
Extrapolated based on when he is apprenticed in FAI.
Implied by when Cinderpaw and Brackenpaw are apprenticed. Bluestar also states that they're ready to be apprenticed, while the other two (the same age) aren't.
Timeline estimated based on what is revealed in the gathering in ITW.
Later revealed to be her seventh life.
Presumably, Ashkit, Elderkit, Fernkit, and Tulipkit.
ThunderClan is told he's dead.
Supporters include Clawface, Stumpytail, Tangleburr, and an unknown silver tabby.
While it's more likely this occured in leafbare, there's no marker of when the season changes, so I'm choosing to interpret this as an early freeze. Future books might adjust this, or I might find something I missed. I'll put following events in leafbare until clarification is provided.
Whitecough which later develops.
It's unclear when exactly Cloudkit is born, but he's relatively young when Fireheart takes him.