Walter Grywacz, class of 1942, served in the US Marines during World War II. He attended radar-training courses at MIT and Harvard, then was sent to the Hawaiian Island for duty as an Adjutant. Grywacz, in the left, was a lieutenant when this photo was taken. On the right is Peter Marchetta, class of 1943.

Read more about Grywacz in the Louis C. Jones Letters:

Letter of October 9, 1943
Letter of February 11, 1944
Letter of April 28, 1944
Letter of March 14, 1945