It depends on which war you mean. The shooting war might end, but with Putin still in power, the economic war (sanctions) will probably continue, because Europe

It depends on which war you mean. The shooting war might end, but with Putin still in power, the economic war (sanctions) will probably continue, because European/US voters will vote out their governments if said governments wanted to return to being friends with Putin (or maybe they won't, voters seem to have short memories).