The literary device used on the title of the poem "War is Kind" is the following:
A. Irony
Irony is the expression of one's meaning by using language that normally signifies the opposite, typically for humorous or emphatic effect. This idea of expressing the opposite of what is actually being said/wrote is present on the title: in this case, by the use of the word "Kind".
ㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤㅤ
If a Caedmon were able to experience a second miracle, he would most likely react by "He would be grateful and praise God in song" although it is possible he would leave as well.
