Conversation so far:
Which war broke out?
Civil War.
What did Seward do in the war?
Seward sent Lincoln a memorandum on April 1, proposing various courses of action, including possibly declaring war on France and Spain.
Why war with those countries?
CANNOTANSWER.
Did he communicate with Lincoln other times during the war?
met with Seward instead, and what passed between them is not known.

Question: Anything else interesting with Lincoln?
Self-contained rewrite: Besides William H. Seward sending him a memorandum, anything else interesting with Lincoln?