He was drafted into the Royal Canadian Air Force in 1943 and after the war took a job teaching city planning at Yale. Enjoying the work, he did little further garden design, and reached the post of professor and chairman of the department of city planning. His publications in this area include articles such as America's super-cities[4] and a number of books on city design in the U.S. The best known may be Man-made America: Chaos or Control? (1963), by Tunnard and Boris Pushkarev,[5] which won the 1964 National Book Award in Science, Philosophy and Religion.[6][7]
In 1969 Yale disciplined him by demotion for sending out unauthorized admission letters to prospective students, following an unresolved departmental dispute.[5]