Assault on Atlantis
Washington DC is laid waste. In Paris, the swastika flies from the Eiffel Tower. More than two billion are dead from the polar caps melting. This is the future former Green Beret Eric Dane, with the help of Amelia Earhart, sees through the mysterious gates unless he can prevent it.
I used a lot of concepts in these books-- time travel, parallel worlds. Also, the concept of whether the anguish from famous military battles could be used as a force for good. Each book has a warrior and a priestess combining forces in the present
Assault On Atlantis