where can i get Gold/Silver Medal

Can someone tell me how can i get a "Silver Medal" and "Gold Medal"?

 

Attending fortress sieges is the best and cheapest way to do so. Find out when your faction decides to go after a fort and keep an eye out on trade chat for people asking for help with sieges. All you have to do is kill the deity, I think you might have to stick around for a majority of the fight to receive medals.

Also if you do attend sieges the medals will be mailed out after the deity dies, make sure you grab those medals A.S.A.P. as there is a bug where if you log out or d/c you will lose the medals in the mail.

 

When a fortress in the Abyss has a glowing red logo on top of it on your map, that means it's vulnerable to the opposing race. Join up with other people and attack the deity inside it, and try to find a group as well if you're under-geared.

This is because the more damage you and your group do, the more likely you'll receive mail which contains medals. Just because you attack and damage the deity, it doesn't guarantee you'll get mail, so gear up and do your best.