Step #1
Draw a rectangle & D shape.
Step #2
Draw tank base & barrel.
Step #3
Draw tank's track.
Step #4
Draw tank's wheel.
Step #5
Draw upper portion.
Step #6
Draw D shape.
Step #7
Draw barrel & muzzle.
Step #8
Draw stars & enhance wheels.
Step #9
Enhance the track.
Step #10
Enhance necessary improvements to finish the drawing.