The Spanish–American War of 1898 provided the Order with a great number of new Veteran Companions – particularly the Pennsylvania Commandery which, according to the MOFW Register published in 1900, accounted for over half of the Order's membership. Among the individuals who joined the MOFW between 1898 and 1900 were Admiral George Dewey, future president Theodore Roosevelt and future General of the Armies John J. Pershing. Most senior officers who served in the Spanish–American War were also veterans of the Civil War, and many belonged to both the MOFW and MOLLUS.