Colonel George E. Fogg, a World War I veteran, commanded the regiment from its organization in 1924 through at least 1941.

[6] As of 2018 this lineage is carried by the 240th Regional Training Institute, Maine Army National Guard, in Bangor.

In ancient fortress warfare the portcullis barred the gateway to the hostile invader.

The phoenix in the lower left is the crest of the City of Portland, the seaport and chief gateway of Maine.

It represents the city (formerly named Falmouth) rising from its ashes after being destroyed by fire three times; by the Indians in 1676, by the French in 1690, and by the English fleet in 1775.

The blue band serving as background for the stars signifies the intermittent existence of the regiment as infantry, especially during the Civil War.