Step one:

Start with a #D5D5D5 background.

Create a new layer-set called Futuristic War Logo.

In a new layer, draw a #DBDBDB polygon. Make sure you set the polygon options to this settings.

Add the following layer styles: Drop Shadow, Outer Glow, Gradient Overlay, Stroke.



Step two:

In a new layer draw another white polygon, a little bit smaller than step one polygon.

Add the following layer styles: Inner Shadow, Gradient Overlay, Stroke.

Set layer's blending mode to Darken.