Short answers, pulled from the story.
Lithuania is a country in the Baltic region of Europe, on the eastern shore of the Baltic Sea. It is bordered by Latvia to the north, Belarus to the east and south, Poland to the south, and the Russian semi-exclave of Kaliningrad Oblast to the southwest, with a maritime border with Sweden to the west.
The capital and largest city of Lithuania is Vilnius. The country covers an area of 65,300 square kilometres and has a population of 2.9 million. Other major cities include Kaunas, Klaipėda, Šiauliai, and Panevėžys.
On the 11th of March 1990, the Supreme Council announced the restoration of Lithuania's independence, making it the first Soviet-occupied state to declare the restitution of its independence. The last units of the Russian Army left on the 31st of August 1993.
In the first half of the 14th century the Grand Duchy of Lithuania expanded to roughly 650,000 square kilometres after incorporating East Slavic territories such as the principalities of Minsk, Kyiv, Polotsk, Vitebsk, and Smolensk. At the end of the 14th century it was the largest country in Europe.
After the January Uprising of 1863 to 1864, the Russian Empire imposed the Lithuanian press ban as part of Russification, alongside pressure on the Catholic Church. Lithuanians resisted through an extensive network of book smugglers, secret publishing, and homeschooling, which fed the Lithuanian National Revival.
Lithuania is known for lasers and biotechnology. The company Šviesos konversija, or Light Conversion, holds an 80 percent worldwide market share with its femtosecond laser system, and Kavli Prize laureate Virginijus Šikšnys is known for discoveries in CRISPR, specifically CRISPR-Cas9. Lithuania became an Associated Member State of CERN in 2018.
Lithuania became a full member of the European Union on the 1st of May 2004 and joined the Schengen Agreement in December 2007. It adopted the euro and joined the eurozone on the 1st of January 2015, replacing the litas.