... just a day out of port the captain is standing on the deck when the lookout calls down "Sir! There's an enemy ship on the horizon!"
The captain turns to his cabin boy and shouts "Bring me my red shirt!"
After the cabin boy brings him the red shirt and he puts it on, the two ships close to fighting range and fight all day, with many heroics on both sides, but with the captain and his red shirt standing alive and victorious as the other ship sinks behind them in the sunset light.
Later that night the cabin boy is curious and asks the captain why he needed his red shirt, and the captain replies "Well, with my red shirt on, none of the men would see me bleeding if I was wounded, and so they would not lose heart and continue to fight on to victory!"
The cabin boy thinks that's pretty clever and goes to bed for the night.
The next day, the captain is standing on the deck as they sail along when the lookout shouts down "Sir! Twenty enemy ships on the horizon!"
And the captain turns to his cabin boy and says "Bring me my brown pants!"