According to the cryptographers and historians who in 2022 have examined an encoded letter sent in 1547 by Charles V to his ambassador in France there was fear that Strozzi would send an assassin.
[1] In 1548 he was in Scotland supporting Mary of Guise of behalf of Henry II of France, during the war of the Rough Wooing.
[2] After he was shot in the thigh by an arquebus at Haddington, Strozzi supervised the works at Leith from a chair carried by four workmen.
He obtained a pyrrhic victory at Pontedera on 11 June 1554, but his army could not receive help from the ships of his brother Leone (who had been killed by an arquebus shot near Castiglione della Pescaia) and he was forced to retreat to Pistoia.
[5] His son Filippo was also a military commander, as was his brother Leone Strozzi, a Knight of Malta, known as the Prior of Capua.