Dominion: Tank Police (ドミニオン Dominion) is a two volume manga series written and illustrated by Masamune Shirow. Set in the fictional city of Newport, Japan, in a future in which bacterial air pollution has become so severe that people must wear gas masks when outdoors, the series follows a police squadron that uses tanks.
Dominion has been adapted into three OVA series: Dominion Tank Police, New Dominion Tank Police (特捜戦車隊ドミニオン Tokusō Sensha-tai Dominion) and TANK S.W.A.T. 01 (警察戦車隊 TANK S.W.A.T. Keisatsu Sensha-tai TANK S.W.A.T.). The first OVA was animated by Agent 21 and released in 1988. New Dominion was animated by J.C.Staff.
The manga was published by Hakusensha, Kodansha and later by Seishinsha. It has been published in English by Dark Horse Comics. The anime has been released in English translation in the United Kingdom and Australia by Manga Entertainment and in the United States by Central Park Media, under their US Manga Corps division.

Anime Summary: Leona Ozaki joins Newport City's infamous Tank Police division. With aid of Al and her newly built mini-tank, Bonaparte, she wages war on Buaku and his cohorts, the Puma Sisters.
(source: Wikipedia, ANN)