[1] Following the loss of Lithuania and Byelorussia to Polish forces in the Polish-Soviet war, the party organized partisan units behind the front lines.

[6][7][2][3][8] Leaders of the Social Democratic Labour Party of Lithuania and Byelorussia included Pranas Eidukevičius and Konstantin Kernovich.

[9] Meanwhile in Soviet Russia, there was no separate Lithuanian national organization within the Bolshevik Party (unlike the case for Latvian and Polish socialists).

[8] The Communist Party of Lithuania and Byelorussia was active in organizing the labour movement in Vilna, building international trade unions.

The Vilna Committee of the party, with Mickevičius-Kapsukas being the main instigator, also organized the launch of a legal workers press.

The Central Bureau of Vilna Workers Class Trade Unions, the labour movement linked to the party, published Undzer lebn ('Our Life') in Yiddish, Pochodnia ('Torch') in Polish and Volna ('Wave') in Russian.

The Central Bureau of Vilna Workers Class Trade Unions had also applied for a permit to publish the newspaper Vilnis in Lithuanian language.

Participants included Mickevičius-Kapsukas, Andrius Brazdžionis, Pranas Aitmanas, P. Pajuodis, P. Kazlaučiūnas, S. Kirvelaitis, P. Lingys, Vincas Grybas, J. Bartuška, P. Bepirštis-Daumantas, J. Janušauskas, J. Voveraitis, J. Lietuvaitis, J. Zonelis, J. Gabrys and J. Galeckas.

[13][14] The Užbaliai conference endorsed the political line of the Russian Communist Party (Bolsheviks), seeking to adapt it to local conditions.

The Suwalki (Vilkaviškis/Marijampolė/Naumieści) delegation consisted of Mickevičius-Kapsukas, J. Zonelis, J. Lietuvaitis, J. Glovackis, P. Lingys, V. Skrinska, J. Krašauskas, A. Ramanauskas, P. Botyrius, Strimaitis and Klimavičius.

[13] The congress elected a Central Committee consisting of Andrius Brazdžionis, Pranas Eidukevičius, Simanas Grybas, Aleksandras Jakševičius [lt], Konstantin Kernovich, Jonas Lietuvaitis and Roman Pilar.

[13][17] The Central Committee elected a Presidium, consisting of Eidukevičius (chairman), Pilar (secretary), and Kernovich (treasurer).

[18] In the December 1918 elections to the Vilna Soviet of Workers Deputies the communists had won 97 seats, the General Jewish Labour Bund 60, Menshevik-Internationalists 22, Lithuanian Social Democratic Party 15.

[13] The Provisional Revolutionary Workers' and Peasants' Government of Lithuania, headed by Mickevičius-Kapsukas and Angarietis, was placed under the leadership of the party Central Committee, rather than the Vilna soviet.

[22] The conference, held in the midst of war communism, decided to oppose the splitting of large agricultural estates.

[22][23] The dominant opinion in the party saw the large estates as a key resource, which would produce significant agricultural output being placed under state management.

[22] Lenin differed with this view, at least in terms of tactics, but would give his blessings for applying this policy in SSR LiB as a specific case.

[13][27] The Central Committee had 8 candidate members - Aleksandra Drabavičiūtė, Karl Rozental, Julian Leszczyński, Juozas Dumša [lt], Adolf Getner [ru], Jānis Perno [pl], N. Sverdlov and Goncharov.

[33] On August 8, 1919 Minsk was seized by Polish forces, whereby the Central Committee of the Communist Party of Lithuania and Byelorussia shifted to Bobruisk, and then to Smolensk.

[35] On September 3, 1919 the Bureau for Underground Work [be] (Lithuanian: Nelegalaus darbo biuras, abbreviated 'NDB', Belarusian: Бюро па нелегальнай рабоце, abbreviated 'BNR') was set-up by the Central Committee of the Communist Party of Lithuania and Byelorussia - which would direct clandestine party organizations and partisan movements in the areas controlled by Polish forces and would send communist organizers across the front lines.

[13] The Kovno Bureau played a key role in reviving the a clandestine communist printing activity inside Lithuania.

[39] But the communists regrouped, and by January 1920 new trade union organizations had been formed in Minsk, claiming a membership of around 4,000 workers.

[40] In the struggle against Polish forces, the party managed to build an alliance with the Vsevolod Ignatovsky's Byelorussian Communist Organization (BKO).

[27] A section of the Central Committee of the Communist Party of Lithuania and Byelorussia (Knorin, Pikel, Reingold, Kalmanovich and others) revived a proposal to integrate the Minsk Governorate into Soviet Russia, within a frame of Byelorussian national-cultural autonomy.

[27] As the merger with RSFSR being rejected, the Central Committee of the Communist Party of Lithuania and Byelorussia decided on July 6, 1920 to begin preparing to re-establish a Byelorussian soviet republic within the Minsk Governorate.

[27][45] But this move met with opposition within the party leadership, on July 12, 1920 Reingold and Pikel issued a statement titled 'On the question of the creation of the Byelorussian Soviet Republic' which rejected creating a Byelorussian national republic and again voiced desire for integration of Byelorussia into Soviet Russia.

[46] On July 30, 1920 the party (represented by Knorin, Iosif Adamovich and Alexander Chervyakov) along with Vsevolod Ignatovsky of BKO and the General Jewish Labour Bund led by Arn Vaynshteyn, held a meeting which decided to reestablish a Byelorussian soviet republic.

[13] Savieckaja Bielaruś [be] ('Soviet Byelorussia') began publishing in February 1920 in Smolensk as the Belarusian language organ of the Central Committee of the party.

[59] Der shtern continued to be the Yiddish organ of the Central Committee during the period the party leadership was based in Smolensk.