http://rbth.com/international/2016/01/27/lithuania-poland-ukraine-form-alliance-in-response-to-russias-rise_562903

Lithuania, Poland, Ukraine form alliance in response to Russia’s rise

January 27, 2016 Yekaterina Zgirovskaya, Gazeta.ru

3 countries to launch joint brigade of 4,000 troops.

Defence ministers, of Lithuania Juozas Olekas, left, of Poland Tomasz Siemoniak, center, and of Ukraine Lt. Gen. Valeriy Heletei shake hands after signing an act forming a joint military unit, during a ceremony in Warsaw, Poland, Sept. 19, 2014. Source: AP

Poland, Lithuania and Ukraine are planning to launch a joint brigade of 4,000 troops by January 2017, Defense News has reported. The multinational military unit, with its headquarters in the Polish city of Lublin, is being formed amid concerns over the development of Russia's military might.
The three countries signed an agreement in September 2014 in Warsaw to form the so-called LITPOLUKRBRIG (Lithuanian–Polish–Ukrainian Brigade) brigade, which will mainly participate in peacekeeping operations.
The defense ministers of the three countries – Juozas Olekas (Lithuania), Antoni Macierewicz (Poland) and Stepan Poltorak (Ukraine) – attended the opening ceremony of the headquarters in Lublin on January 25.v