SEOUL–Romania will buy $920 million worth of South Korea’s K-9 self-propelled howitzers, in its largest weapon acquisition in seven years, Seoul’s defense ministry said on Wednesday.

The deal was announced in a meeting between South Korean Defense Minister Shin Won-sik and his Romanian counterpart Angel Tilvar, during Shin’s visit to the Eastern European country.

Shin and Tilvar agreed that military cooperation between Russia and North Korea threatens the security of Europe and Asia, and close cooperation with the international community in responding to the matter was necessary.

In April, South Korean and Romanian leaders held a summit and pledged to boost defense industry cooperation.

Romania’s decision to purchase K-9 howitzers, following in the footsteps of Poland, will expand the footprint of South Korea’s defense industry in Europe, Seoul’s defense ministry said on Wednesday.

South Korea is working to establish itself as the world’s fourth-largest arms exporter.

Shin is set to head to Poland for a three-day trip later on Wednesday, where he will meet Polish Defense Minister and deputy Prime Minister Wladyslaw Kosiniak-Kamysz and discuss defense and arms industry cooperation.