37 cards where the set is “bro” and the cards are cards that are included in the standard contents of draft boosters and (the card types include “soldier” or the text includes “soldier artifact creature token”)

Aeronaut Cavalry (The Brothers' War #1)
Ambush Paratrooper (The Brothers' War #3)
Mass Production (The Brothers' War #15)
Myrel, Shield of Argive (The Brothers' War #18)
Phalanx Vanguard (The Brothers' War #19)
Recruitment Officer (The Brothers' War #23)
Siege Veteran (The Brothers' War #25)
Survivor of Korlis (The Brothers' War #28)
Warlord's Elite (The Brothers' War #32)
Yotian Medic (The Brothers' War #33)
Platoon Dispenser (The Brothers' War #36)
Scrapwork Cohort (The Brothers' War #37)
Yotian Frontliner (The Brothers' War #42)
Air Marshal (The Brothers' War #43)
Retrieval Agent (The Brothers' War #60)
Skystrike Officer (The Brothers' War #62)
Wing Commando (The Brothers' War #73)
Zephyr Sentinel (The Brothers' War #74)
Battlefield Butcher (The Brothers' War #86)
Emergency Weld (The Brothers' War #93)
Kill-Zone Acrobat (The Brothers' War #106)
Conscripted Infantry (The Brothers' War #129)
Fallaji Chaindancer (The Brothers' War #134)
Mishra's Onslaught (The Brothers' War #143)
Roc Hunter (The Brothers' War #150)
Citanul Stalwart (The Brothers' War #175)
Gaea's Courser (The Brothers' War #181)
Perimeter Patrol (The Brothers' War #188)
Tomakul Honor Guard (The Brothers' War #195)
Fallaji Vanguard (The Brothers' War #210)
Hajar, Loyal Bodyguard (The Brothers' War #211)
Harbin, Vanguard Aviator (The Brothers' War #212)
Hero of the Dunes (The Brothers' War #213)
Third Path Iconoclast (The Brothers' War #223)
Yotian Tactician (The Brothers' War #228)
Urza, Planeswalker (The Brothers' War #238b)
Spectrum Sentinel (The Brothers' War #244)

Their mind whirled with grand plans, never thinking of what might happen if they got to the end of the list.