There's no historical documents written in Lithuanian until 16th century, all constitutions, so called statutes were written in Old Slavic aka Old Russian language and Polish language.
All main battles were won by Slavic people, including Grunvald battle, because Slavs was the main part of population of so called Grand Duchy of Lithuania.
Historical monuments of the Baltic states were built or rebuilt (including medieval castles) by Russian architects or foreign architects who arrived to Russian Empire from France, Italy or Germany.
Very popular among tourists Trakai castle was reconstructed or better to say created in Soviet Union and even president is sitting inside building built by project of Russian architect.
First military stuff of independent Baltic states countries consisted of Tsarist army officers and they were teaching in military academy.
Please, give me a Baltic (or any) gf then... Thank You!