What is defined as a tactical conflict between opposing forces?

The term that best describes a tactical conflict between opposing forces is "battle." A battle typically involves larger forces and can consist of multiple engagements, making it a central event in military operations that can determine the outcome of a war or campaign.

An engagement refers to a more specific, often smaller-scale conflict that can happen between smaller units, rather than the larger formations typical of a battle. While engagements do represent tactical conflicts, they are usually components of a larger battle.

A skirmish implies an even smaller encounter, often characterized by quick and less formal exchanges of fire between smaller units. It highlights quick, isolated incidents rather than a structured fight.

An operation encompasses broader military activities that aim to achieve strategic objectives, which can include battles but is not limited to direct conflicts. It involves planning and executing various tactical maneuvers and may include logistical support and reconnaissance.

Thus, the focus on tactical conflict between opposing forces aligns most closely with the definition of a battle, establishing it as the correct term in this context.