I took 2 bases, one oil and one steel. But when I logged into game again a few hours later they were enemy bases again, and I got no resources at all. Now im out of oil and have to use gems to do anything.
When you occupied a oil or steel field, it will cost time to collect resource. So you should send warships to guard your fields, otherwise players will plunder your fields. The more players join the game the more competition come into being. Thanks for your play this game. Any problems feel free to contact me.