You could take a cheap long sleeve shirt, draw the lines on it in the correct places. This will be your pattern. Cut all the sections.
Get fabric in the correct colors.
Add .5" or .25" (depending on how close you want to sew) around all of your marked areas to cut your pattern out of your good fabric.
Sew back together.
Overall you have 3 colors. One black sleeve, pea and olive greens for the rest.