Go for Broke: Japanese American Soldiers of WWII Cachet | USPS.com
From the article: "...Honor the thousands of Japanese Americans who served in World War II with this new cachet.The #10 envelope features art derived from the Go for Broke: Japanese American Soldiers of WWII stamp and includes a Forever® stamp cancelled with an official First Day of Issue postmark.
The cachet comes with a protective sleeve. ..."
Article Reference: store.usps.com