In 326 BC, Alexander marched on India with over 30,000 men in a move as orchestrated with the grace of a ballet. He shone in the face of adversity, even honored his own enemies for their commitment to duty and faith. Don't expect a strict historical. Alexander, like everything in Campaign, is used as a tool, a metaphor or an archetype, to challenge the reader to question the nature of life, existence and being. His role in the book is to be an example against whom all human fears and failings might be judged.
Campaign is certainly a book that examines human fears and failings.
Outside, the universe has been vanquished. It simply doesn't exist. Decades pass in limitless corridors of locked doors and no escape. Inside is contemplation, outside is nothing. Everything is white, sterile and clean, and the white doesn't want the travelers to leave.