The British had occupied Diamond Rock, a small but strategically significant formation off the coast of Martinique, as an extension of their naval power in the Caribbean. Recognizing the importance of this position, the French and Spanish forces coordinated a campaign to reclaim control over the area. Their military collaboration stemmed from ongoing tensions rooted in conflicts in Europe and competition for colonial dominance in the Americas. Utilizing naval support, the allied forces approached stealthily to exploit vulnerabilities in the British defenses. The assault commenced with artillery fire directed toward the British garrison, which had not fully anticipated such a concentrated assault on their position. This battle involved not only land forces but also ships that provided bombardment support, illustrating the intertwined nature of naval and land warfare during this period.

As the assault progressed, the British defenders, despite being outnumbered, mounted a vigorous defense. Supplies ran low, and morale was tested as the allied forces pushed forward. The rugged terrain of Diamond Rock provided both an advantage and a disadvantage. The attacking forces struggled with harsh conditions while simultaneously attempting to dislodge British forces from their well-fortified positions. The brutal fighting ultimately tested military tactics employed by both sides and highlighted the fierce competition between empires in the Caribbean regional theater.

The engagement ended with the British holding their ground, illustrating both the resilience of their defensive strategies and the challenges of organized assaults on entrenched positions. This military encounter underscored the volatility of the Caribbean during the Napoleonic Wars, where colonial interests were often at odds, leading to complex alliances and confrontations on distant shores.