The Republic of Kaluga is a republic located south of Yuktobania.
In 1986, Kaluga and Yuktobania entered into a border dispute known as the Tyumen Dispute. Details are scarce, but it is known that Yuktobania and Kaluga went into battle during the dispute, most famously in what is known as the Battle of Zhytomyr. Both the Yuktobanian Air Force and northern Kalugan forces suffered considerable damage during this battle, but no other details are available.
- Fans mistakenly believed that Kaluga was where the events of Air Combat took place. In actuality, Air Combat did not name any location for its events; it was later retconned as the Skully Islands in Ace Combat 04: Shattered Skies promotional material.
- In the real world, Kaluga is the administrative center of the Kaluga Oblast in Russia.