South Korea’s increasingly prominent role in the global arms trade — exemplified by its growing defense partnership with Poland — has raised the possibility of a shift in the balance of power in an industry where U.S. defense contractors have long been dominant.

As Seoul extends its reach, its influence is reshaping the traditional dynamics of international arms trade and directly impacting U.S. strategic and commercial interests.

But while arms sales to Poland have helped drive this change, the country is now threatening to disrupt South Korea’s arms export ambitions.

Szymon Holownia, speaker of the Polish parliament, announcedon Sunday