To train an army, you must pay with a purple potion called “elixir”, and then wait for the troops to train and gain power. You need to make the judgement of what troops to use and how many of them to use because there is a limit of how many troops you can use to make it fair to the other bases you attack. Informations about Clash of Clans here! Some troops take up more space in your army like dragons take up 20 spaces, archers take up only one, but the very large rock monster golems are 30 spaces!