I AM JUST GOING TO CUT THROUGH A LOT OF BULLSHIT THAT HAPPENED SINCE GERMANY SENT LENIN INTO RUSSIA

 UKRAINE WAS,AND HAD FOR CENTIRIES BEEN PART OF OLD RUSSIA, AS WAS CRIMEA.

LENIN WRONGLY BARGAINED IT AWAY INTO AND AS A SEPARATE ENTITY,  AS PART OF A DEAL OF ADHESION WITH A STRONGER GERMANY, TO GET THE HELL OUT OF WWI AND NOT TO HAVE GERMANY INVADE RUSSIA DURING LENIN'S TAKEOVER CIVIL WAR.

THE TREATY WAS CALLED BREST LITOVSK.