Visitors are seen at a booth for naval guns at the Baltic Military Fair in Gdansk, Poland on June 27, 2018. The Baltic Military Fair was held between 25th to 27th June in Gdansk. (Xinhua/Jaap Arriens)

A man in uniform is seen in a desert buggy Visitors are seen a at the Baltic Military Fair in Gdansk, Poland on June 27, 2018. The Baltic Military Fair was held between 25th to 27th June in Gdansk. (Xinhua/Jaap Arriens)

Salesmen are seen at a booth for automatic rifles at the Baltic Military Fair in Gdansk, Poland on June 27, 2018. The Baltic Military Fair was held between 25th to 27th June in Gdansk. (Xinhua/Jaap Arriens)

Polish manufactured automatic weapons are seen displayed on a wall at the Baltic Military Fair in Gdansk, Poland on June 27, 2018. The Baltic Military Fair was held between 25th to 27th June in Gdansk.(Xinhua/Jaap Arriens)

Visitors are seen at a booth for helicopter at the Baltic Military Fair in Gdansk, Poland on June 27, 2018. The Baltic Military Fair was held between 25th to 27th June in Gdansk. (Xinhua/Jaap Arriens)