You can get Medals(WM) by:
1. Participating in clan war - limit 1 WM per day
(need to reach enemy fort if you are attacker, encounter attacker at least once if you are a defender)
2. Being an attacker in clan war - limit 10 WM per day
(every 5 attack to enemy fort, you could get 1 WM)
3. Daily PVP - limit 2 WM per day.
(need to sink your target, 100% drop)
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You can get Ember by:
1. You can get ember by joining a clan and taking part in the clan skirmish battles.
2. You can also get ember during certain clan events on some month.
3. You can also get ember from the clash of crew event held monthly.
Outpost skirmish event:
http://bswiki.weebly.com/outpost-skirmish.html