When we isolate Poland and compare it with Mali or the Incas it looks great, the sheer numbers look great, but if we look at the role it plays in European history, we see that it stayed away from the main events of its time, it plays a marginal role.
It seems You don't know the European History enough. It was something very opposite. Give me "main events" were Poland played a marginal role and I will give you here events, to support my words:
1)
1004-1018 - Wars with Holy Roman Empire, won by Poland. There not many powers in Europe able to not get conquered or vassalized by Holy Roman Empire and their crusades
2)
1410 - Battle of Grunwald - Greatest battle of mediewal Europe. Poles, Lithuanians, Tatars, russians, Moldavians beat proud chivalry from Teotonic Oder and Western Europe Mercanaries. That was also the first time when were used bombards on the battlefield. Victory finally stoped nothern crusades.
3)
1444 - Crusade and battle of Varna. - Coalition of christian countries (Poland, Hungary, Bohemia, Papacy, Bulgaria, Croatia, Romania, Moldova , Wallachia and Venice) under orders of polish King started a crusade against turk who just started to advance in Southern Europe. Battle finally was lost and this had a major influence on Balcans and let Turks to conquer smaller countries one by one.
4)
Jagiellonian Dynasty - Who rulled several countries (mainly Poland, Lithuania, Bohemia, hungary) with territory over 2 000 000 km² form Baltic Sea to Adriatic and Black Seas. Jagiellonian Queens were mothers of Emperor of Holy Roman Empire, kings of Poland, Bohemia, Hungary, Sweden, Muscovy, Dukes of Lithuania, Bavaria, Brandenburg, Saxony.
5)
1655-1661 Northern Wars - Conflicts between Sweden and Polish-Lithuanian Commonwealth, Russia, Brandenburg-Prussia, the Holy Roman Empire and Denmark-Norway. Maybe not the biggest one but significant in XVII century.
6)
1683 Battle of Vienna and Holy League- Turning Point in history of Ottoman Empire. Holly League forces (Polish-Lithuanian Commonwealth, Franconia, Saxony, Swabia, Austria, Bavaria under command of Polish King Jan III Sobieski were able to repell siege of Vienna, and advance with other great victory at Parkany. That was the begining of the end of Ottoman Empire
7)
American Revolutionary War - Among many of recuits from all europe, two peaople became a national heroes of USA - Kościuszko and Pułaski. Kościuszko was recuited by Franklin in France and then became head engineer of Continental Army. His work made significant contributions to the American successful retreat from the battle of Ticonderoga and victory at Saratoga in 1777. From 1777 to his death, Pułaski fought in the American Revolutionary War for the independence of the United States. He was a noted cavalryman and, as the "Father of the American Cavalry," created Pulaski's Legion, one of the few cavalry regiments in the American Continental Army. He took part in the Battle of Brandywine, the Siege of Charleston, South Carolina, and the siege of Savannah, Georgia. One of the first tributes to Pułaski was paid when George Washington on November 17, 1779 issued a challege-and-password set for identifying friend and foe when crossing military lines: "Query: Pulaski, Response: Poland".
8)
Duchy of Warsaw and Napoleonic Era - In 1797 in Italy was formed a first Polish Legion, fighting for France against Austria. Then Polish army was fighting under command of Napoleon almost everywhere when he advanced through his military campaings. As a result for some time Poland retaken independency as a Duchy of Warsaw. Polish troops were first who enter Moscow.
9)
1914-1918 I World War - Even if Poland didn't enter the war as independent country, polish troops were one one the major forces in war especially on the eatern front. "Polish Issue" was also one of the most discussed worldwide and finally Polish indepedence became a fact. In one his "Fourteen Points" USA president Woodrow Wilson ponted:
Establishment of an independent Poland with access to the sea
But for independence Poland had to fight their own.
10)
1920 - 1921 Miracle at the Vistula and Soviet advance - The Bolsheviks had in 1919 gained the upper hand in the Russian Civil War, having dealt crippling blows to the White Russians. Vladimir Lenin viewed Poland as a bridge that had to be crossed so that communism could be brought to Central and Western Europe, and the Polish-Bolshevik War seemed the perfect way to test Bolshevik strength. Bolshevik speeches asserted that the revolution was to be carried to western Europe on the bayonets of Soviet soldats and that the shortest route to Berlin and Paris lay through Warsaw. Bolsheviks defeat in several battles in Poland stopped Soviet Union from ekspansion for the next 20 years
11)
1939-1945 II World War - Poland was one of the major Allied Countries. Polish troops were fighting at every front from Siberia, to North Africa, from Poland, to Antlantic Ocean. Polish cryptologists had a major influence of breaking the enigma code and 147 polish pilots in Battle of Britain has scored 20% of total kills of RAF
So, Danieldaniel, which main events I missed where Poland didn't play a role?