When Prime Minister Narendra Modi lands in Jakarta on July 6, he arrives not on a routine state visit, but as the leader of a civilisation reconnecting with its oldest maritime partner in a new strategic age. As the Indo-Pacific remoulding unfolds, India and Indonesia — two of its largest democracies — are quietly positioning themselves as co-architects of its emerging security architecture. China’s increasingly assertive posture in the South China Sea and its deepening presence across Southeast Asia have accelerated a recalibration among regional states. There is growing anxiety about the shifting stature of Southeast Asia in Washington’s strategic calculus, with the 2025 US National Security Strategy providing only limited focus on the region. This will nudge ASEAN states to diversify their security partnerships and presents an opportunity for India to strengthen its own. As the world’s largest archipelagic nation, Indonesia overlooks some of the world’s most critical maritime chokepoints — the Malacca, Sunda, and Lombok Straits — through which the vast majority of global trade transits. India’s Act East policy has long recognised …