You might have deemed our long gun-deckTwo hundred feet of hell.
The River Fight (published 1864). Compare: "War is hell", attributed to William Tecumseh Sherman; "This is the soldier brave enough to tell, The glory-dazzled world that 'war is hell'", Henry van Dyke, On the St. Gaudens Statue of Sherman.
Up the River of DeathSailed the Great Admiral!Henry Howard Brownell
Since what unnumbered yearHast thou kept watch and wardAnd o’er the buried Land of FearSo grimly held thy guard?Henry Howard Brownell