Question: What two countries participated in the war between 1617-1618 in order to take Polish pressure off of Russia?

<P0-S0> The Polish–Swedish Wars were a series of wars between the Polish–Lithuanian Commonwealth and Sweden. <P0-S1>  Broadly construed, the term refers to a series of wars between 1563 and 1721. <P0-S2>  More narrowly, it refers to particular wars between 1600 and 1629. <P0-S3>  These are the wars included under the broader use of the term: <SEP> <P1-S0> Polish–Lithuanian relations date from the 13th century, after the Grand Duchy of Lithuania under Mindaugas acquired some of the territory of Rus' and thus established a border with the then-fragmented Kingdom of Poland. <P1-S1>  Polish-Lithuanian relations subsequently improved, ultimately leading to a personal union between the two states. <P1-S2>  From the mid-16th to the late-18th century Poland and Lithuania merged to form the Polish–Lithuanian Commonwealth, a state that was dissolved following their partition by Austria, Prussia and Russia. <P1-S3>  After the two states regained independence following the First World War, Polish-Lithuanian relations steadily worsened due to rising nationalist sentiments. <P1-S4>  Competing claims to the Vilnius region led to armed conflict and deteriorating relations in the interwar period. <P1-S5>  During the Second World War Polish and Lithuanian territories were occupied by both the Soviet Union and Nazi Germany, but relations between Poles and Lithuanians remained hostile. <P1-S6>  Following the end of World War II, both Poland and Lithuania found themselves in the Eastern Bloc, Poland as a Soviet satellite state, Lithuania as a Soviet republic. <P1-S7>  With the fall of communism relations between the two countries were reestablished. <SEP> <P2-S0> The "8th" annual (void) Venice International Film Festival was held from September 1 to September 8, 1940, less than three months after Italy had belatedly entered the Second World War as Germany’s ally. <P2-S1>  Together with the 1941 and 1942 it is 'considered void- as if they did not happen'. <P2-S2>  The events were held in places far away from the Lido, and very few countries participated due to World War II and directors that were members of the Rome-Berlin axis. <P2-S3>  In fact the Festival lost its ‘international’ designation that year, as the war had reduced the number of participating nations to just three: Italy, Germany and, in a sparring role, Hungary. <P2-S4>  It became therefore the "Manifestazione cinematografica italo-tedesca", to reflect its Italo-German character. <P2-S5>  The two countries participated with seven feature films each, while Hungary had three. <SEP> <P3-S0> The Polish–Swedish War (1617–18) was a phase of the longer Polish–Swedish War of 1600 to 1629. <P3-S1>  It continued the war of 1600–11 and was an attempt by Sweden to take Polish pressure off Russia. <P3-S2>  The Polish–Lithuanian Commonwealth was then also fighting Tartars and (on the southern front) the Ottoman Empire. <P3-S3>  Russia and Sweden were at that stage allied, prior to the Ingrian War, part of the Polish–Muscovite Wars. <P3-S4>  The 1617–18 war's cause was a dispute over Livonia and Estonia, and a dispute between Sigismund III Vasa and Gustavus Adolphus over the Swedish throne.