partizan

This man was a decided partizan of the French parliaments, and well known to be an inveterate enemy of the Jesuits.

From The New Conspiracy Against the Jesuits Detected and Briefly Exposed with a short account of their institute; and observations on the danger of systems of education independent of religion by R. C. (Robert Charles) Dallas

Anastasius had favored the Greens, but Justinian was a partizan of the Blues.

From A History of Rome to 565 A. D. by Arthur Edward Romilly Boak

“Yes, we’ll have his goat in about a minute!” added another Morningside partizan.

From Baseball Joe on the School Nine or, Pitching for the Blue Banner by Lester Chadwick

Macaulay here speaks like a heated haranguer or Parliamentary partizan, not like an historian or a critic.

From The Celtic Magazine, Vol. 1, No. 1, November 1875 A Monthly Periodical Devoted to the Literature, History, Antiquities, Folk Lore, Traditions, and the Social and Material Interests of the Celt at Home and Abroad. by Alexander Macbain

I had as lief have a Reed that will do me no service, as a partizan I could not heave.

From The plant-lore & garden-craft of Shakespeare by Henry Nicholson Ellacombe