The party identified its priority by resolving national matters and pushing its struggle for social liberalization of the working class to the secondary set.

[4] In the spring of 1905, in his polemics with Dmytro Antonovych that was covered on pages of the party publishing Pratsia, Mykola Porsh argued his opinion about the dependence of social and economic oppression from national.

[5] Vladimir Lenin characterized the party as "representatives of the most low-grade, stupid and reactionary nationalism" who betray "interest not only democracy in general, but its own fatherland, Ukraine.

The Fourth (Unity) Congress of the RSDLP rejected the proposal which the USDLP spokesman had made for the immediate discussion of the terms of a merger, and referred the matter to the Central Committee for decision.

[4] Arguably, the reason that there was no merger was the fact that the USLDP, the UPSR, and the URLDP all favoured an independent Ukrainian state.

[4] The "Union" declared its loyalty to the Central Powers (Austria-Hungary and German Empire) considering that they could help Ukraine to free from the Russian domination.

[4] Such position was held by an editor of published in Moscow newspaper Ukrainskaya zhyzn (Ukrainian life) Symon Petlyura and his supporters.

[4] Such position of proletarian internationalism had been held by the USDLP abroad organization publishing in Geneva, newspaper Borotba (Fight).

[citation needed] As the government of Ukraine was emigrating into exile during the Russian-Ukrainian war of 1918–1919, a section of the USDLP was formed as the 'Foreign Delegation' of the party.

During 1919 the party's Central Committee included Yosyp Bezpalko, Andriy Livytsky, Mykola Shadlun, and I. Romanchenko.

The party also issued the quarterly Vilna Ukraina from Detroit, with Mykola Nahirniak as its editor and Volodymyr Lysyj as its director.