Mrs. Croft mentioned in her conversation with Mrs. Musgrove that she had travelled to Lisbon with Admiral Croft. Lisbon had been a port of war operations and under French control from 1806 to 1814, and was subject to invasions and occupation. It was a dangerous place to be, showing Mrs. Croft contradicting other female characters. 

Looser, Devoney. “Surviving Wars in Jane Austen's 'Persuasion'.” Wondrium Daily, 6 May 2022, https://www.wondriumdaily.com/surviving-wars-in-jane-austens-persuasion/.