- Charles Steinway’s 5th Regiment of New York Militia participates in the occupation of Arlington Heights, Virginia.
- Fearing that Charles Steinway might die in a battle, and his share of the partnership would be inherited by his wife, Heinrich Engelhard Steinweg and his sons Henry, Jr. and William re-write Steinway & Sons partnership agreement. From now on wives of the partners can inherit the value of their husbands’ share in the business, but would not be accepted as partners in the firm. This serves twofold purpose: preventing women from controlling the company, and keeping Steinway & Sons shares in the bloodline and out of the hands of in-laws.