Which preposition to use with guerra

at Occurrences 1%

In the village of Caimito, a short distance from Guanajay, along that road, I visited Pino Guerra at his then headquarters when he and his forces so menaced Havana that Secretary Taft, in his capacity of Peace Commissioner, ordered their withdrawal to a greater distance.

of Occurrences 1%

Smeet'Il Capitano Giac SmeetI have long suspected my English master of ignorance, for he was merely one of our Leghorn pilots, who has sailed in a bastimento de guerra of your countryhe called your honorable name 'Smees,' Signore.

Which preposition to use with  guerra