Act as a Principal Systems Architect. Design a high-level architecture for a low-latency, high-frequency trading platform that operates across three global regions (New York, London, Tokyo). The system must enforce strict ACID transactional consistency for order placement while maintaining sub-millisecond latency for market data dissemination. Address the following in your response: 1) The database topology (considering CAP theorem trade-offs), 2) Inter-region communication protocols to minimize clock drift, 3) A conflict resolution strategy for network partitions, and 4) An approach to handling hardware failures without data loss. Provide a written explanation followed by a list of key technologies and protocols.