The poems from
For the Union Dead built upon the more personal, looser style that Lowell had established in
Life Studies. For instance, some of the poems are written in free verse or with a loose meter, and some contain irregular rhymes or no rhymes at all. However, although many of the poems in this volume are personal, their subject matter is different from
Life Studies as there are no poems that focus on the subject of Lowell's mental illness. Instead, the more personal poems here focus on Lowell's close family relationships, centering on individuals like his daughter ("Child's Song"), his cousin Harriet Winslow ("Soft Wood"), his father ("Middle Age"), and his ex-wife ("The Old Flame"). However, since these poems do not involve taboo subject matter, they are not as notably "
confessional" as some of the poems in
Life Studies. The closest that Lowell comes to addressing his mental illness is in the poem "Eye and Tooth" when, in the final line, he writes, "I am tired. Everyone's tired of my turmoil." Other notable subjects in these poems include Lowell's childhood ("Those Before Us" and "The Neo-Classical Urn") and famous historical figures like
Caligula (in "Caligula") and
Jonathan Edwards (in "Jonathan Edwards in Western Massachusetts"), bringing multiple
world history subjects to the book. Historical subjects would later become the main focus of his book
History, published a few years later. In comparison with
Life Studies, Lowell stated, "
For the Union Dead is more mixed [with different kinds of poems] and the poems are separate entities. I'm after invention rather than memory, and I'd like to achieve some music and elegance and splendor, but not in any programmatic sense. Some of the poems may be close to symbolism." =="For the Union Dead" (poem)==