However, if you never change your defense you lose this advantage. The main advantage you have as a defender is the fact the attacker doesn't know which units you're using. Basically if there are 70 players in your neighborhood, the easiest ones to breach will be attacked most frequently and those harder to breach will be attacked far less or not at all. The majority of players will stop attacking you if battling you becomes troublesome for them. Offense is indeed your best defense, in the way that the more damage your units apply to the enemy, the better you have defended yourself.

So your best course of action is to aim at a moderate/advanced defense which most players won't go up against because of potential losses, and not giving away all the space in your city for an unreachable 'perfect defense' dream. It doesn't matter in what era your city is, what units you use, or what your defending army's attack/defense bonus is - there will always be at least someone who can breach your defenses. If getting a building or two plundered feels like the end of the world for you, do remember this is not solely a city building game and it may not be what you're looking for. You can only lose a single production which is ready and sitting there waiting to be collected, and hasn't been motivated in the meantime. If you do not want to be plundered, plan ahead and time your productions so that you can collect on time. This guide is not about how to avoid being plundered.

It doesn't make the defense listed here bad, it just makes it ineffective for your specific case.

However, all defenses have a counter-offense so if in your case one of these didn't work it means you need to make a change. All of this info and the defenses are applicable in the game, they all work. It may also differ not only in how it is presented but in the information it provides - Daniel's guide is fantastic and all, but it's way too outdated and 99% of the units have undergone some changes since then that directly influences the performance of those units in battle. This guide has been mainly inspired by Daniel's General Offensive/Defensive Military Guide, but it will not touch up on the topic of offensive military.

Forge of empires army guide