Unmanned systems will present the greatest danger and structural growth opportunity over the next decade, former CIA director David Petraeus said, pointing to conflicts in Iran and Ukraine as evidence of how warfare is rapidly evolving.

Speaking at the UBS Asian Investment Conference, Petraeus said the increasing use of drones in conflict zones showed both the growing danger of unmanned weapons and the urgent need to improve defenses against them.

“Much of this is going to be all about unmanned systems and the defenses against them, which have not been adequate in this case,” Petraeus said.

“It’s never going to be perfect, but it can be much better than what it is that we have seen.”

The proliferation of drone combat in the Middle East will push the region to invest in defensive and offensive capabilities.