Definition
A firm’s defensive strategy mitigates competitive and environmental threats via pre-emption, deterrence, redundancy, and rapid response.

Introduction
Defense protects the base so offense can compound. The best defense often changes the terms of engagement.

Explanation

Pre-emption: exclusive contracts, capacity reservations, prime locations, standards leadership.

Deterrence: credible commitments (long-term pricing guarantees, loyalty switching costs), public capacity announcements.

Hardening the core: redundancy in supply, security by design, incident response.

Counter-positioning: adopt a model rivals can’t copy without hurting their core (e.g., membership pricing vs. high-margin retail).

Exit & containment: discontinue vulnerable SKUs, geofence offers, litigate IP when necessary.

Key Takeaways

Defense is designed, not improvised.

Credibility matters—empty threats invite attack.

Counter-positioning can force rivals into painful trade-offs.

Real-World Case
TSMC defends via capacity leadership, technological roadmaps, long-term customer commitments, and geopolitical diversification—deterring entry and lock-in at the cutting edge.