WTF I met all requirements
I come from an old throne of France,->descendant of King Robert II of France
My sword did make enemies tremble,->he wacked some enemies early on and had a very strong army
At first only a lamb,->ye he started young but also
look at his shiny necklace
I shattered the foe,->battle of Montlhery
and then shattered myself,->battle of Nancy
like the youthful Alexander,->meh, Alexander never got shattered
with that ancient walled city,->Nancy
gazing down upon my shattered corpse->Nancy
and with my demise,
so too did it fall,
the entire hope of the nation.->Burgundy getting rekt not long after his death.