According to my understanding, he was poisoning the well.
Step-by-step explanation
This is best on the statement that the author says he does not support the England selfish.
He, therefore, suggests that because of the inevitability of the England war, everybody should preserve peace in their time.
Failure to this, they will be pushing the battles to the future.
Ultimately, Tavern believes that the baby in his arms will suffer the consequences of war when she is old enough, and he does not know what to experience it anymore.