Defense Tech Becomes Major Startup Category: Castelion Hits $13B Valuation

Castelion raises $1B at $13B valuation for hypersonic technology, marking defense as a rapidly growing startup vertical. Follows Helsing ($18B) and other defense AI plays. Erik Prince also launched Vectus, an 'air defense as a service' startup with Swarmer, indicating massive capital flow into military tech.