2nd Massachusetts Militia Regiment

The 2nd Massachusetts Militia Regiment, also known as 2nd Mass, is one of the twelve regiments that make up the Massachusetts Militia, led by Colonel Porter. After the loss of South Boston to the enemy, Porter decided that all Militia units should retreat from Boston and evade the skitters until an appropriate way to fight them could be found. Porter divided the Militia into 12 regiments, to each consist of 100 or more fighters and about 100 civilians (at the time the aliens air surveillance seemed to ignore groups of humans below 500 in number) and to all forage and live off the land. One of those regiments was the 2nd Mass. It is made up of 111 fighters and 200 civilians, led Captain Daniel Weaver, whose second in command is Tom Mason who was a military history professor pre war. Its Headquarters is currently the John F. Kennedy High School in the suburb of Acton, Massachusetts outside of Boston.

(From the Falling Skies Wiki)