Help find a book o read about 10 years ago

I vividly remember reading this book when I was growing up between 2012-2014
However there’s a small issue where I only remember a few story points
1) the main story revolves around dragons and dragon eggs set in a fantasy land with some crossover/timetravel into a past real time ww1
2)the red baron shows up as a villain to fight dragons
3) there was a side character called will who was the love interest of the main girl and will was also a pilot
4) I think the book cover was yellow or gold with a picture of a dragon or dragon eye/egg on it

Anyone heard of anything like this or have I made this all up