The Fourth Corporate War is also known as the "Ocean War"; both OTEC and CINO wanted to acquire the bankrupt IHAG to fill in the gaps of their respective businesses.
At the beginning of the war, nobody had hopes for OTEC: CINO possessed the world's most advanced submersibles and other patent-protected vessels, practically the ruler of the seas; even Arasaka's aircraft carriers used their technology, while OTEC only had a bunch of seemingly less robust ocean technology.
But as mercenaries for Military Technology, Lao Snake rode OTEC's biological weapons like a ghost on the sea, raiding numerous marine resource platforms and, until the war ended, had never been caught.
In a world where most people doubted him, he relied on flesh and blood to take down many Arasaka-affiliated oceanic war vehicles. With countless victories, as the final winner, he became a legend in Military Technology's mercenary group at Night City.