Which preposition to use with compaign

of Occurrences 1%

Marshal Berwick had taken the fort of Kehl in the month of December, 1733; he had forced the lines of the Austrians at Erlingen at the commencement of the compaign of 1734, and he had just opened trenches against Philipsburg, when he pushed forward imprudently in a reconnoissance between the fires of the besiegers and besieged; a ball wounded him mortally, and he expired immediately, like Marshal Turenne; he was sixty-three.

Which preposition to use with  compaign