on a regional congress of bolsheviks in ukraine took place in kiev. the congress decided to create a single party for ukraine and call it "rsdlp(b) – social-democracy of ukraine" (). the party elected a chief committee that consisted of aussem, shakhrai, lapchinsky, bosch, zatonsky, aleksandrov, kulik, grinevich, gorvits and candidates lyuksemburg, gamarnik, galperin, pyatakov. on the all-ukrainian congress of soviets was begun in the merchant's assembly building in kiev. after the bolsheviks realized that they would not gain a majority in the congress, they demanded that the gathering was not recognized as a congress, but rather as a meeting. when their proposal was rejected, the 127 bolsheviks left the congress. on the same day () the government of soviet russia sent an signed by vladimir lenin and lev trotsky giving the ukrainian side 48 hours to respond. the next day the government of russia, without waiting for an answer, declared that it considered the central council of ukraine its enemy and appointed vladimir antonov-ovseyenko as the commander of the soviet red guards. on the 124 delegates that left the all-ukrainian congress of soviets gathered in a special meeting in the kiev central bureau of trade unions and adopted a resolution about the relentless struggle with the central council, about the immediate election of the all-ukrainian central executive committee of soviets and about moving to kharkiv to carry out the congress there. on the central council of ukraine sent an answer to the soviet ultimatum signed by volodymyr vynnychenko and symon petlyura, rejecting it. the next day the red guards led by antonov-ovsiyenko invaded kharkiv, completely taking over the city on and starting the ukrainian–soviet war. ovsiyenko's army was supported by cheka military formations led by mikhail rozen. on the same day () the first stage of the treaty of brest-litovsk negotiations began, although its signing would take over two months.