To complete the sentence, we can provide an appropriate phrase that fits the context of the sentence. Here is one possible way to complete it:
Joan wanted to meet Captain Squire \underline{to discuss the strategy for the upcoming battle.}
Alternatively, you could complete the sentence with another logical continuation based on context.
% Final Answer
Final Answer:
Joan wanted to meet Captain Squire \underline{to discuss the strategy for the upcoming battle.}