Just a small info bit, a knight or other servant of a ruler or lord would never take a knee to a ruler or lord from a different nation or someone they feel is of a lesser position. Kneeling is an act of submission. Doing so to another lord is disgracing the lord you rule, acting as the lord in front of you is of a higher authority.
At most they would have bowed or some other respectful gesture to the king of another nation in the beginning scene.