Which Swedish king led the Protestant intervention in 1630?

The Swedish king who led the Protestant intervention in 1630 was Gustavus Adolphus.

Gustavus Adolphus, also known as Gustav II Adolf, was King of Sweden from 1611 until his death in 1632. He entered the Thirty Years' War after landing in Pomerania in June 1630 with Swedish troops. Sweden intervened on the Protestant side, opposing Emperor Ferdinand II and the Catholic forces aligned with the Habsburgs.

His motives combined religion, security, and strategy. Gustavus wanted to support Protestant communities, prevent the Habsburgs from dominating the Baltic region, and protect Swedish commercial and political interests. French financial support and the end of Sweden’s war with Poland-Lithuania made the intervention possible.

Gustavus transformed the course of the war. His victory at the First Battle of Breitenfeld on 17 September 1631 relieved pressure on the Protestant cause and established him as one of Europe’s leading commanders. He was killed at the Battle of Lützen in 1632, but Sweden remained a major force in the conflict for years afterward.

The other listed names belong to different periods or roles and did not lead Sweden’s 1630 intervention.