Code Geass: Hangyaku no Lelouch R2, Girls & Panzer Recommendations
While the plot of these two are completely different, there are some similarities. The main character is the commander of a group. During battle, he/she commands others to do things and outwits the opponent. Both use machines—tanks in GUP and Nightmares in Code Geass. During the battles, the atmosphere is similar, but the shows are completely different outside of the battles.