New Delhi, March 25 -- Defence minister Rajnath Singh on Tuesday asked the military brass to draw "operational and technological" lessons from the ongoing US-Israel war with Iran to bolster India's defence preparedness, in a directive that came during a wide-ranging review of the West Asia crisis, which has disrupted global supply chains, sparked a surge in oil and gas prices, and rattled the global economy. "We need to formalise a comprehensive integrated roadmap for the next decade factoring in the lessons learnt, challenges and opportunities going forward whilst ensuring Atmanirbharta (self-reliance) and operational readiness across all fronts," Singh said at a meeting attended by the chief of defence staff, the three service chiefs, the defence secretary and other senior officials. Singh was briefed on the latest global and regional security developments, the impact of a possible escalation of the ongoing conflict on India, and the challenges and opportunities presented by the current geopolitical uncertainties. "The impact of the (West Asia) situation on supply chain management towards procurement and production of defence equipment, including maintenance and serviceability of existing equipment, was also examined," the defence ministry said. Days after the Iran war broke out, navy chief Admiral Dinesh K Tripathi said that recent global conflicts have raised questions about the existing notion of "short and decisive wars," adding that countries need to stay prepared for challenges by building their own defence industrial complexes. "Not only must one produce (military equipment) at scale but one must also be ready to upgrade while producing," he said, responding to a question about lessons learnt from recent military confrontations....