Gasaraki (1998)
Plot
The US and fictional Middle-Eastern Belgistan are at war. The US takes heavy loses when Belgistan uses their giant robots, but they get help in military aid from Japan including a superb giant robot and its Japanese pilot.
Where to watch Gasaraki?
Gasaraki is an action show featuring Mami Kingetsu and created by Hajime Yatate.
Gasaraki is currently streaming for free (ad-supported) on Crunchyroll.