A multibillion-dollar contract signed by Seoul this week to supply arms to Poland has underscored the strength of South Korea’s defence industry.Observers, however, warn that a growing global trend involving bloc-based arms trade could cast a shadow over the country’s future as a major weapons exporter.The consortium of Hanwha Aerospace and Hanwha-WB Advanced System (HWB) on Monday signed a 5.6 trillion-won (US$4 billion) contract with Poland’s arms procurement agency, the Polish Armament...