Seabiscuit stood at 15.2 hands or about 5 feet 2 inches.
War Admiral, the famous Thoroughbred racehorse, had several offspring, including both fillies and colts (foals). Notably, he sired a number of successful racehorses. However, since he is a male horse, he could not have had a filly, as fillies are female horses. Instead, he fathered foals of both genders.
16.2 hh
It is about 20 hands tall
Zenyatta is 17.3 hands
15.3 Hands
War Admiral died in 1959.
Afleet Alex is 16hh
He did not have a horse he was an Admiral, not a soldier. You are probably being confused with a British racehorse called "Lord Nelson" who died several years ago. The horse has no relation to the historic Admiral.
Empire Rose was 17 hands.
17 hands high
War Admiral won in 1937.
War Admiral was born in 1934, in Lexington, Kentucky, USA.