Poland was partitioned in 1795 and again in 1815. In 1918 what happened?

Question

Before political activism and eventual election in 1990 as President of Republic of Poland, what was Lech Wałęsa's occupation?

Answer 1

It regained its independence, as the Second Polish Republic
Poland had been partitioned among the Kingdom of Prussia, the Russian Empire, and Old Austria. Napoleon re-created the state in 1807 but after his defeat in 1815 the Allies re-partitioned it.