For Christmas my nana gave me a lapel pin that belonged to my great grandfather. He served in the 143rd infantry during WWII, however I can't find any information on the specific pin. https://imgur.com/a/zN5rOYX
This crest belongs to the US Army 133rd Engineer Battalion. It was a part of the Maine Army National Guard.
Source: https://www.usamilitarymedals.com/products/133rd-engineer-battalion-unit-crest-to-the-last-man