Seize -

Unbreakable (broken mix)

Accessory -

Obsession

Icon of Coil -

In Absence

finally! doommovie.com

Neikka RPM -

I'm Your Girl (d-koy mix)

massive troops (easy to train) - germans
rifle - british
machine gun - american inventor, germans
barb wire - american inventor, germans
food preservation
telephone - alexaner graham bell
airplane
air warfare (propeller synchronizer) - fokker
tanks
gas
goodbye cavalry!