It was a star fort made of stone , brick , and sod , with 14 heavy guns including two 50 - pounder ( 7.25 - inch , 184 mm ) Columbiads .
The initial construction at Fort Preble was part of the Second System of US fortifications .
Fort Preble was a star fort made of stone , brick , and sod , with 14 heavy guns including two 50 - pounder ( 7.25 - inch , 184 mm ) Columbiads .
The initial construction at Fort Preble was part of the Second System of US fortifications .