For a military look, something that was popular in the Regency era you can use mounded buttons with your frogs and then you do not need to make the knot ball that modern frogs have.
For the outside edge of the frogs I made for the Spencer above I copied this modern frog.
When I was picking materials for the Spencer I chose this braided wool cord to go with the gray wool I was using. I roughly laid out the shape and size of the frogs I was going to make.
I then drew a full size pattern to use to layout and tack stitch the frogs over. These are the ones for the right side. You should be able to copy this and print it out at 100% to use it as a pattern by just dragging it to your desktop.
These is the pattern for the left side. Check out this page for how to layout and tack stitch the cord to create the individual frogs. Then you can applique the frog onto your garment while adding the buttons. You should be able to copy this and print it out at 100% to use it as a pattern by just dragging it to your desktop.
The long straight parallel lengths of cord do need to be appliqued to the fabric as well as the triple loops. The single loop will slip over the button to close the garment so placement is important and it is best to close that loop around the button and stretch out each set so you are sure the garment will close correctly when they are sewn on.
Here is another shot of Alex Adrian wearing the Spencer. She is modeling my Polish Hat for the pattern cover.
Here are both Alex Adrian and Laurie Tavan modeling Regency French Bonnets for the pattern covers. You can see that I also appliquéd some cord on the back of the collar and added 2 buttons with a loop of cord to close the cuffs.