This episode takes place in East Asia in 1287 and in Arizona in 1968.
Some stock footage of battle is taken from Taras Bulba (1962), which can be obvious at times, due to the differences in the uniforms.
Series regular Lee Meriwether and guest star Arthur Batanides would appear together almost two years later, both as guest stars, in the third-season episode of Star Trek (1966) titled That Which Survives (1969).