Because of death France will take to making a journey,

Fleet by sea, marching over the Pyrenees mountains,

Spain in trouble, military people marching:

Some of the greatest Ladies carried off to France.

The wars between France and Spain were conducted fairly regularly for several centuries. It is difficult to determine which of these refers to this quatrain. By deciphering the number a war was chosen, which France began in 1635 with the purpose of expanding its possessions.

The first line says about someone's death. We can assume (without any certainty) that this is Gonzalo de Cordoba, a prominent Spanish commander, who participated in many battles against France. He died in February 1635.

The 2 line. Military operations were conducted, mainly, in the border areas in the Pyrenees, Flanders and on the sea.

The 4 line. As a result of the war, the peace treaty was concluded. Under the terms of the treaty, the French King Louis XIV should was to marry the daughter of the Spanish King Maria Theresa.

Decoding of the number 4.2. If 2 to flip in 5, 400-5=395, 1 to put in front, 9 to flip in 6 and to put before 3, then we get 1635 – the year of beginning war.

Quatrain 7.10 Philip V

Par le grand Prince limitrophe du Mans,

Preux & vaillant chef de grand exercite :

Par mer & terre de Gallois & Normans,

Caspre passer Barcelonne pille Isle.

By the great Prince bordering Mans,