The American forces included:

OLYMPIA - (5870 tons, four 8" guns, ten 5" guns, 21 secondary rapid fire guns, six torpedo tubes, 381 men) 

BALTIMORE - (4413 tons, four 8" guns, six 6" guns, 8 secondary rapid fire guns, 328 men) 

RALEIGH - (3213 tons, one 6" gun, two 5" guns, 12 secondary rapid fire guns, 2 torpedoes, 252 men)

BOSTON - (3000 tons, two 8" guns, six 6" guns, 6 secondary rapid fire guns, 230 men) 

CONCORD - (1710 tons, six 6" guns, 6 secondary rapid fire guns, 155 men) 

PETREL - (892 tons, four 6" guns, 3secondary rapid fire guns, 110 men)

HUGH McCULLOCH- (exchanged fire with Battle on El Fraile Island, otherwise not engaged, 1280 tons, 4 secondary rapid fire guns, 68 men) 

NANSHAN - (not engaged, unarmed)

ZAFIRO - (not engaged, unarmed)

Information source: Spanish-American War Centennial Website