Shortly after his marriage, while in George Washington's camp during the American Revolutionary Era, John Laurens met and became extremely close friends with Alexander Hamilton. They exchanged many letters during the several years when different assignments and Laurens' capture by the British kept them apart; for example, when the terms of Laurens' parole prevented him from being present at Hamilton's wedding to Elizabeth Schuyler in December 1780, even though Hamilton had invited him. While emotional language was not uncommon in romantic friendships among those of the same gender in this historical period, Hamilton biographer James Thomas Flexner stated that the intensely expressive language contained in the Hamilton-Laurens letters "raises questions concerning homosexuality" that "cannot be categorically answered".