A U.S. Marine with 4th Marine Regiment, 3rd Marine Division participates in the Advanced Infantry Marine Course on Camp Schwab, Okinawa, Japan, April 1, 2020. 3rd Marine Division conducts mission essential training to remain ready to respond to any crisis situation throughout the Indo-Pacific region. - A U.S. Marine with 4th Marine Regiment, 3rd Marine Division participates in the Advanced Infantry Marine Course on Camp Schwab, Okinawa, Japan, April 1, 2020. 3rd Marine Division conducts mission essential training to remain ready to respond to any crisis situation throughout the Indo-Pacific region.