Bill, I doubt very much that Caesar's troops ate salad. So far as I can ascertain, salads were invented in the middle ages as something to fill your gut and keep off the pangs of starvation whilst fasting; they were not viewed as providing any significant nourishment, hence OK to eat on a fast. This is mentioned in the Decameron, I believe (going from memory) in the story about Alibech & Rustico. Salads then consisted of field greens dressed with salt (only), which is where the word "salad" comes from.

I believe the Caesar salad was named for the proprietor of a New York restaurant or night club, but don't know who off hand. Helen - can you help here?