1.Make sure you are wearing the proper boots for goosestepping
2.Begin by kicking up the left foot to the desired height, keeping both knees straight.
4.Immediately kick up with your right foot.
5.Repeat kicking up your left and right feet.
6.Move your arms in the correct manner in the same rhythm.
Once you have mastered the basic technique,then you just have to wear a Nazy Uniform with it and Done you ready to build your fucking army, here the video: