What do the symbols when you recruit a new unit represent?

What do the symbols when you recruit a new unit represent? - Contemporary kitchen with stylish empty furniture

When you recruit units in Knights and Merchants there are symbols below the portrait of the unit you are recruiting. Although I know two of the symbols represent attack and defense, some units like the Pikeman have a third symbol. (looks like bunch of v's connected together) What does this symbol mean?

Here is a picture:

pikeman's symbols

How do all of these symbols translate to actual combat? If you have one defense does that mean you have to be hit one more time to die?

knights-and-merchants

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