What if Karl Filip Vasa actually became the czar of russia

in Russia during the time of troubles when Russia was in a big mess the czar died whit out an heir and nobody knew who was the true czar(some boyars just said that they where the true czar and started fought each other) and false Dimitri who claimed to be the previous czars son and heir and was supported by the Polish mainly because he was a catholic and it would expand their influence over Russia and where only stopped by a Swedish Russian alliance after the war French Swedish general Jacob De la Gardie took Moscow and was kicked out so he took Novgorod where he succeed in convincing the Russian boyars(nobles) to elect Swedish prince Karl Filip Vasa to become the next czar but his mother Kristina of Holstein-Gottorp thought it was to dangerous for the 10 year old boy(she refused that he could leave) but what if he hade become the czar the Swedish riksdag(parlament) liked the idea of a Russian ally this would of course this mean no Romanov czars
 
well to expand Sweden would have help from Russia when they invaded Poland to size Latvia and most importantly Riga this could make the war shorter Karl Filip would not die in the siege of Riga because he would be on the Russian front this might lead to Sweden entering the thirty years war earlier and help the Danes against the Austria and Spain which would change the thirty years war very much whit Sweden and maybe Russia entering the war this would make it harder for the Austrians to get Denmark to give upp and it would not surprise me if the French bankroll the Swedish and Russians to fight the Habsburgs
 
My guess is that the boyars would end up performing a Vas(a)ectomy.
would be hard we are talking about Gustavos Adolfos the father of modern warfare and Jacob De la Gardie is compared whit Napoleon some times and there is Axel Oxenstierna(it was his idea to move over the ice to take Copenhagen) which are considered as some of the best generals of there time
 
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