Finnish view of history tends to be that we were the victims of colonialism, held by Sweden for half millennium, with foreign language and religion forced upon us while taxed and recruited for their military campaigns. And that is part of the truth.
But by the 18th century there were people (if mostly of Swedish origin) in Finland drinking Indian tea from Chinese cups. We weren't isolated from the pattern of European colonization of world.
And as part of Sweden, we did for some amount benefit of Atlantic slave trade. (A book was just published on the issue, inspiring me to write this.) Aside small short-lived colonies in Africa and North America, Sweden held for a century Caribbean island of Saint Barthélemy (then returned to France), starting 1784. While the island wasn't fitting for farming, it became a profitable free port, especially at some points and after the Napoleonic Wars when Sweden became neutral and unaligned between the major European powers. Around the end of 18th century, there were decades when Finnish industry through imported cotton and sugar can be said to have benefited from slavery.
Sweden abolished slavery 1847.