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 Raumschiff Enterprise (1966) titled That Which Survives (1969).
Percussion igniters, also known as a percussion cap or primer, is a device that uses a sharp blow to ignite a small charge, which then ignites the main propellant or explosive in a firearm, mine, or other explosive device. It's a key part of the percussion lock system in firearms, where a hammer strikes the percussion cap to ignite the charge and fire the weapon.
The makeup on Sarit (Vitina Marcus) is very similar to the makeup on Lee Meriwether in That Which Survives (1969) in her role as Losira. Even the costume bares some similarity.