A surprise victory by Pakistani Chinese-made jet fighters in an air battle with Western-made Indian aircraft has triggered alarm in the global defense industry. The opening of hostilities on Wednesday morning between India and Pakistan saw one of the largest air battles in modern history,

India’s missile and bomb strikes on targets in Pakistan and Pakistani-controlled Kashmir have spiked tensions between the two nuclear-armed neighbors, with Pakistan’s leader calling the attacks an act of war.

Pakistan said it shot down five Indian fighter jets, which it identified as French- and Russian-origin fighter aircraft.