How do you address an envelope to a retired colonel who is also a chaplain and his wife?

To address an envelope to a retired colonel who is also a chaplain and his wife, you would write:

Colonel and Mrs. John Smith
[Street Address]
[City, State, Zip Code]

Make sure to use "Colonel" as the title, followed by "and Mrs." to respectfully acknowledge both individuals. If you know the chaplain's first name, you can include it before his last name.