My effort at it…
1 Storm the Doors
Challenge #1 - Disable 5 Vehicles
Challenge #2 - Destroy 2 vehicles with Anti-Tank Grenades
Challenge #3 - Get a multikill with AT Mines
Challenge #4 - Complete 10 Squad Orders
Challenge #5 - Perform 5 kills with Dynamite
Reward 50k Assault Kit XP
2 Selfless Courage
Challenge #1 Heal 20 different allies
Challenge #2 Capture 10 Flags
Challenge #3 As a Medic, perform 15 kills with Self-Loading rifles
Challenge #4 As a Medic, score 20k points
Challenge #5 Perform 20 Squad revives
Reward 45K Medic Kit XP
3 Supporting the Support
Challenge #1 Perform 20 Squad resupplies
Challenge #2 Repair vehicles for a total of 300 damage
Challenge #3 As a Support, score 20k points
Challenge #4 Perform 20 kills using any LMG
Challenge #5 As a Support, suppress 10 different enemies
Reward 50K Support Kit XP
4 Eye on the Prize
Challenge #1 As a Scout, perform 4 headshots with any Rifle
Challenge #2 Perform 3 kills with Spotting Flares
Challenge #3 Capture 10 Flags
Challenge #4 As a Scout, score 20k points
Challenge #5 Perform 20 Spot Assists
Reward 30K Scout Kit XP
5 Omniverous Palate
Challenge #1 As a tanker, score 20k points
Challenge #2 Perform 10 kills with Tanks
Challenge #3 In a tank, disable 5 Vehicles
Challenge #4 Complete 10 Squad Orders
Challenge #5 In a tank, perform 5 multikills
Reward 50k XP
Staying Focused (Complete 5 of 6 Challenges to Unlock reward)
5a Leading from the Front (Basic)
Challenge #1 Perform 10 kills with Shotguns
Challenge #2 As an Assault, destroy 5 vehicles
Challenge #3 Perform 10 kills with the AT Rocket Gun
Challenge #4 As Assault, perform 20 kills in a round
Challenge #5 Perform 10 kills with Melee Weapons
Challenge #6 Complete 25 Squad Orders
Generic - Bayonet Training
5b Leading from the Front (Veteran)
Challenge #1 Perform 10 Multi-Kills
Challenge #2 Destroy 25 vehicles with Anti-Tank Mines
Challenge #3 Perform 50 kills with Stationary Weapons
Challenge #4 Score 15000 points in a round
Challenge #5 Perform 30 Squad-Wipes
Challenge #6 Perform 50 Capture Point Attacker kills
Assault - Juggernaut
6a Dependable (Basic)
Challenge #1 Perform 5 Suppression Assist kills
Challenge #2 Perform 10 kills with the Mortar - Air
Challenge #3 Resupply 30 allies
Challenge #4 Damage 10 Vehicles with Limpets
Challenge #5 Complete 25 Squad Orders
Challenge #6 Perform 10 Capture Point Defender kills
Generic - Inconspicuous
6b Dependable (Veteran)
Challenge #1 Resupply 100 allies
Challenge #2 Perform 25 kills with Limpet Mines
Challenge #3 Perform 25 headshots with LMGs
Challenge #4 Capture 100 flags
Challenge #5 Perform 50 Kill Assists
Challenge #6 Perform 100 Repairs
Support - Unbreakable
7a Healing Hands (Basic)
Challenge #1 Heal 10 different squad members
Challenge #2 Revive 10 different squad members
Challenge #3 Perform 20 Kills with sidearms
Challenge #4 Get 50 kills with Self Loading Rifles
Challenge #5 Perform 5 kills with the Medical Syringe
Challenge #6 Complete 25 Squad Orders
Generic - Hasty Retreat
7b Healing Hands (Veteran)
Challenge #1 Heal Allies for a total of 10000 health
Challenge #2 In a round revive 25 allies
Challenge #3 Perform 50 headshots with Self Loading Rifles
Challenge #4 Perform 10 Last Man squad spawns
Challenge #5 Earn an MVP Ribbon
Challenge #6 As a Medic, perform 50 kills with Grenades
Medic - Concealed Rescue
8a Eagle Eye (Basic)
Challenge #1 Perform 10 Spot Assist kills
Challenge #2 As a Scout accumulate 200m of headshots
Challenge #3 Kill 10 enemy scouts
Challenge #4 As a Scout, perform 15 Headshots with any rifle
Challenge #5 Perform 5 Tripwire Kills
Challenge #6 Complete 25 Squad Orders
Generic - Quick Unspot
8b Eagle Eye (Veteran)
Challenge #1 Achieve the Counter Snipe scoring bonus 50 times
Challenge #2 Capture 50 flags
Challenge #3 Kill 20 different enemies with Spotting Flares
Challenge #4 Damage 25 planes
Challenge #5 Perform 30 kills with Melee weapons
Challenge #6 Finish a round in the Top 5
Scout - Perimeter Alarm
9 Vehicular Chaos
Challenge #1 Perform 15 road kills
Challenge #2 As a Pilot capture 10 flags
Challenge #3 Perform 50 Kills on horseback
Challenge #4 Perform 50 kills whilst using any tank
Challenge #5 Perform 50 kills whilst using any plane
Challenge #6 Perform 20 kills in a boat
Assault - Controlled Demolition
10 It’s Where you Stand
Challenge #1 As a medic, kill 25 enemy medics
Challenge #2 As an assault, kill 25 enemy assaults
Challenge #3 As a scout, kill 25 enemy scouts
Challenge #4 As a support, kill 25 enemy supports
Challenge #5 Perform 25 kills with the cavalry sword
Challenge #6 Destroy 25 explosives
Medic - Stimulant Syringe
11 Modal Yodel
Challenge #1 Perform 50 Melee kills
Challenge #2 Perform 50 Squad Spawns
Challenge #3 In a round, capture 10 flags
Challenge #4 Perform 25 Assist counts as kill
Challenge #5 Perform 25 Savior Kills
Challenge #6 Achieve Ace Squad 5 times
Scout - Scapegoat
12 It’s in the Game
Challenge #1 Achieve 50k squad score
Challenge #2 Perform 50 Suppression Assists
Challenge #3 Perform 50 Stationary weapon kills
Challenge #4 Perform 50 kills with Sidearms
Challenge #5 Damage 20 wings
Challenge #6 In a round, earn 10000 points
Support - Pin Down