Which preposition to use with marcius

at Occurrences 1%

Marcius at that time happened to be on guard.

by Occurrences 1%

And so much did Marcius by his valour eclipse the reputation of the consul, that, had not the treaty concluded with the Latins by Spurius Cassius alone, in consequence of the absence of his colleagues, and which was engraved on a brazen column, served as a memorial of it, it would have been forgotten that Postumus Cominius had conducted the war with the Volscians.

in Occurrences 1%

VIII] ¶Tarquinius, by using wealth, knowledge, and great wit opportunely everywhere, put Marcius in such a frame of mind than he was enrolled by the latter among the patricians and among the senators, was often appointed general and was entrusted with the guardianship of his children and of the kingdom.

Which preposition to use with  marcius