Grab the “Fairbairn Sykes” knife, play some Squad Conquest, and rank up your ToW Chapter 4 XP .

Let’s look at the tasks. Remember that the exact mission requirements can be found in game in the Tides of War menu.

KEEP MOVING - 12,000 CHAPTER XP
Capture 8 objectives

LEAVE A MARK - 12,000 CHAPTER XP
Build 25 fortifications in objective areas.

NONE LEFT BEHIND - 12,000 CHAPTER XP
Revive squadmates or be revived by squadmates 15 times.

STAKE YOUR CLAIM - 4,000 CHAPTER XP
Earn 2500 defensive score.

TOE THE LINE - 4,000 CHAPTER XP
Complete 5 squad orders.

PICK YOUR BATTLES - 12,000 CHAPTER XP
Kill or down 15 enemies while attacking or defending objectives.

FIRE MISSION GRANTED - 12,000 CHAPTER XP
As a squad, call in 40000 requisition points worth of reinforcements.

WHAT REALLY MATTERS - 25,000 CHAPTER XP
Earn 15000 objective score.

(OPTIONAL) BIT OF A MESSY JOB - 12,000 CHAPTER XP
Kill 1 enemy using the Fairbairn-Sykes Fighting Knife.

– Braddock512

[2019] *Battlefield V Chapter 4: Defying the Odds Week #9 - "Through Thick And Thin"