El Capitan was originally an operetta which was first produced in Boston in 1896. It was initially very popular and there are occasional revivals even to this day. The march of the same title uses themes from the opera and was also published in 1896. One notable feature - resulting from the use of themes from the operetta - is the abrupt transition from 6/8 to 2/4 half way through the march.
This arrangement was prepared for the 2013 Summer concerts of Brass Band of the Western Reserve, musical director Dr Keith M Wilkinson.