The Battle of Đồng Đăng marked a significant confrontation between French colonial forces and Qing Dynasty troops in the ongoing Sino-French War. Occurring in the Tonkin region of Vietnam, the battle was instigated by rising tensions as the French sought to solidify their control over Vietnam, which was part of their broader colonial ambitions in Southeast Asia. On this day, French forces, commanded by General Louis Bichot, engaged a larger Chinese contingent that had crossed into the region to assert their influence and protect their interests. The French employed superior tactics, leveraging their artillery and strategic positioning to gain the upper hand in the skirmish.

The outcome of the battle not only boosted French morale but also significantly impacted the strategic landscape of the region. Following their victory at Đồng Đăng, French forces continued to press forward, leading to the eventual consolidation of French control over Vietnam. The victory also demonstrated the willingness of the French military to engage aggressively in the region, laying the groundwork for further military expeditions that would culminate in the establishment of French Indochina.

In the aftermath, the French pressed their advantage, engaging in subsequent battles that would further diminish Chinese influence in the area. This victory at Đồng Đăng can be viewed as a turning point that underscored the shifting power dynamics in Southeast Asia, as European imperial powers began to dominate over traditional local governance and tribal affiliations.