I need to found a writer

Question

A writer is also a soldier, he has a famous book, he underestimates Italy. At the same time he has a book about a monarch,He was seriously injured in the war he participated in, then he left the army and toured Europe for 10 years.The writer becomes unable to use one of his feet as a result of an accident in his 30s. In the city where the author died, there is a street bearing his surname. and this writer is a founder of an foundation i need that foundations name

Answer 1

The writer you are probably referring to is Antoine-Henri Jomini and his foundation, The Jomini Foundation