"The military town is planned to be built at the in the Šalčininkai district bordering Belarus."
Lithuania's Rudninkai training ground,
about 20 miles south of Vilnius, since 1948:
Rudninkai training ground is an existing Lithuanian military base, going back to 1948, of roughly 65 square miles, about 20 miles south of the capital, Vilnius.
Rudninkai is being upgraded to allow stationing of a German armored brigade.
And your issue with this is what, exactly?
Lithuanian armed forces locations: