LitCharts assigns a color and icon to each theme in The Once and Future King, which you can use to track the themes throughout the work.
Chivalry, Satire & Medieval Life
Fate (Time)
Quest and The Holy Grail
Might vs. Right
War
Summary
Analysis
Six years pass. The boys continue their lessons and Wart is changed into many different animals. Kay becomes more difficult; he loses his temper easily, challenges everyone to fights, and becomes very sarcastic. Wart continues to be stupidly fond of Kay. It is nearly time for Kay's initiation into knighthood and the boys drift further apart—Kay does not care to associate with Wart anymore, who is to be his squire.
Kay's evolution into a knight continues to accentuate his difference from Wart. Yet, Wart, however, seems too innocent and unquestioning. He blindly follows Kay despite Kay's arrogance and un-chivalric behavior.