The Afghan Campaign is a historical novel by the American writer Steven Pressfield. It was first published in 2006 by Doubleday. It is the story of Alexander the Great's invasion of the Afghan kingdoms in 330 BC through the eyes of Matthias, a young soldier from Macedonia, who narrates the adventures of the Macedonian army against the Eastern warriors. Matthias fights for Alexander the Great's infantry confronting ferocious people who, determined to defend their homeland, follow tough war methods.

Steven Pressfield is an American author of historical fiction, nonfiction, and screenplays, including his 1995 novel The Legend of Bagger Vance and 2002 nonfiction book The War of Art.