Lebanons was in Antiquity a vast forest.
Egyptians, not having wood, used to trade for the wood of this regions, that was excellents on top of that (ever see a cedar ?) and tried (often with success) to conquer it.
In fact, when you speak of Pharaonic Egypt, all theses regions WAS egyptians very often (You see a lot of Egyptian things in Liban-like regions. Even Jesus is only an adapted version of Horus). Libanese was always of a great interest for Egyptians.