Localized version of the Zaku Tanks had been fielded by Zeon Arm Force across the Earth during the One Year War. For instance, In October U.C. 0079, after hearing that his song was getting a major debut, EFF soldier Cpl. Eledore Massis of the 08th Mobile Suit Team broke the order to standby and went to a town near the Southeast Asian frontline to celebrate with his comrade Cpl. Michel Ninorich. However, the town turns out to have been occupied by the Zeons, and they were captured. In order to escape, the duo stole a Zaku Tank, but they were soon discovered by a passing Armored Vehicle, which began firing on the Zaku Tank. Due to Eledore's claustrophobia, he refused to close the cockpit hatch even under fire. Eventually, a stray shot shattered a display screen in the Zaku Tank's cockpit, injuring Eledore. Despite his wounds, Eledore managed to destroy the Armored Vehicle by crushing it with the Zaku Tank's excavator arm.
Another example of Zaku Tank's variant include Cpl. Kurt Blatt's unit fielded by the Zeon Army's Engineering Battalion in Kharkov, Ukraine circa October, UC 0079 which features the torso of MS-06W Worker Zaku. Blatt's unit would eventually undergo several field modifications included the addition of the 180mm Cannon from MS-06K Zaku Cannon and torso replacement with MS-06G Zaku II High Mobility Ground Type.
After the end of One Year War, many captured Zaku Tanks were employed at the Federation bases across the world, including its Jaburo headquarters in South America.