Invasions - The World Embassy Trick

It used to be that you could come back to an invaded neighbor every 4 hours to collect loot.  In January 2012, Zynga changed the looting time to once every 12 hours.  If you miss being able to loot more often or want to finish quests that require invasions or looting more quickly, read on.

Here’s the trick to get more invasions and looting.  The key lies in the World Embassy, a building that players get early in the game but that many decide to not use.  If you activate the World Embassy, all your occupations on invaded neighbors are cancelled.  This allows you to invade those same neighbors again almost immediately.  Invading deactivates the World Embassy.  Furthermore, you can reuse the World Embassy in another 6 hours, rather than wait to loot in another 12 hours. 

Essentially, this trick cuts in half the invasion loot timer.  The cost is that you have to fight more often, which takes up energy and possibly units and power-ups.  This could be a good thing if you are using invasion battles to farm resources.