The Pittsfield Colonials were a baseball team in the independent Canadian-American Association of Professional Baseball, based in Pittsfield, Massachusetts. The team was previously known as the American Defenders of New Hampshire (often simply referred to as the "Defenders"), and prior to that was known as the Nashua Pride.

The Colonials (in their previous incarnations as the Defenders and the Pride), played in Nashua, New Hampshire from their debut as part of the Atlantic League of Professional Baseball in 1998 until the end of the 2009 season, and called Holman Stadium in Nashua home, until the summer of 2009. In August of that year, the city of Nashua evicted the Defenders from their home and parked a tractor on home plate, refusing to move it or let the team back into the stadium until $45,000 in back rent and property taxes were repaid to the city.

The team has played at Wahconah Park, the former home of the Berskhire Black Bears of the Northeast League (the Can-Am League's predecessor), since 2010; the Colonials are the first Can-Am or Northeast League team to call the park home since the Black Bears moved to New Haven, Connecticut in 2004. The team's name was chosen in March 2010 after a contest run by the Berkshire Eagle, one of the two papers that have covered the Colonials since the 2010 season.

The move to Pittsfield forced the displacement of Wahconah's previous tenants, the NECBL's Pittsfield American Defenders, which were owned by the same ownership group that bought the Pride in 2008. In the case of the Pride and the former Pittsfield Dukes, the ownership group changed the name of the team. The American Defenders name was an homage to the U.S. Armed Forces. One of the prominent members of the team's prior ownership group, Terry Allvord, is the founder of armed forces baseball in the modern era and a retired U.S. Naval Lieutenant Commander who served 23 years and logged over 5,000 flight hours as a rescue swimmer and helicopter pilot. The former Pittsfield franchise in the NECBL is now based in Mystic, Connecticut, where it is known as the Mystic Schooners.

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