They say it is a strategy game, but honestly it is mostly money spending game. The server which spends the most always wins. There are purple officers and gold officers. Purple officers are not powerful for end game content and become obsolete after 200 days of game play. After you get t5, your research Speed ups become obsolete. T4F does not give you an option to convert obsolete material to useful material.They keep giving you tonnes of useless material as rewards. Don't waste your time on KoW