Your offensive and defensive strategy can be the difference between success and failure. 1.2.7 Step 7: Our Strongest Military Defense – Colonial Age Units The Ultimate Forge of Empires Military Guideįorge of Empires, you will know that your Forge of Empires Military Strategy is essential.1.2.6 Step 6: Our First Serious Military Defense – Great Sword Warriors and Heavy Knights.1.2.5 Step 5: Switch to Defensive – Longbow Archers and Cannons.1.2.4 Step 4: Our Military Defense that Damages – 8 Trebuchets.