8BX3NLMA gives a whole bunch of Combat Missions for certain ships   https://na.wargaming.net/shop/redeem/?bonus_mode=8BX3NLMA
https://eu.wargaming.net/shop/redeem/?bonus_mode=8BX3NLMA
https://asia.wargaming.net/shop/redeem/?bonus_mode=8BX3NLMA