Part of the Jurai Defense Core, the 1st Guards were not always considered to be a viable tactical assault force.  Early in Juraian history, when 'Mechs were in short supply and skilled pilots were the most valuable commodity, Warlord leadership of Jurai found it inefficient to use hardened combat veterans to staff a mostly-decorative unit.  The 1st Imperial Guards were attached to the Imperial Leadership, primarily utilized for formal parade, House formal affairs, and guardianship of the Royal Family.  Therefore, this regiment was largely comprised of retired volunteer pilots, injured duty reserve, and those recruits deemed too “disaster prone” to be trusted with front line duties.

This all changed during the major conflicts that erupted during and after the struggle for Herotitus.  Pressed for available troop expenditures, the 1st Guards were forced into front line service to support Juraian leadership when they found themselves deployed in assault actions.  The Guards, at that point, were such a motley collection of young & old talent that most did not believe they'd be able to stand as an effective military unit.

Once a Juraian, always a Juraian.  The 1st Guards proved themselves time and time again in tricky situations, holding planetary assault lines, reinforcing more “respected” sister regiments, and staging outright guerrilla warfare on several worlds.  After a decade of front line service, the 1st Imperial Guards earned a reputation as crack force, focused on victory.  Outside their 'Mechs, the Guards are still a motley collection of grandfathers, cripples, and young “black sheep”.  Suited up, however, they are one of the most disciplined fighting groups in the IJAF.  Wearing twin red streaks of “blood” down the cockpits of flat-black Battlemechs, they are considered some of the finest front line soldiers to be found.

“Anywhere, anytime.”  This the unofficial credo of the elite 9th Cav, sole survivors of one of Jurai's most horrific Pyrrhic victories.  Although always considered to be a skilled outfit, 9th Cav were dropped along most regiments from the 3rd Army over Fire Bear controlled territory -– 12 regimental task forces hit fortified positions, but due to poor intelligence and light air cover, 11 of the regiments were decimated in pitched point blank combat.  The 9th Cav survived the melee with relatively light losses, due in large part to the unit's mobility, adaptability and skill.  Since then, the other 11 Cavalry regiment designations have been retired – leaving the 9th Cav as the flagship unit of the 3rd Army.

In the years that followed, the 9th Cav became the go-to regiment for dangerous high altitude drops, operations centered behind enemy lines, and precision strike raids. Preferring speed & mobility over heavy armor & weapon configurations, the 9th Cav moves light and minimize their dependency on ammunition based arms.  Many of their pilots are qualified mechanics as well, allowing them the freedom of battlefield retrofits to overcome damage in extended campaigns.

Now a seasoned strike team, the unit has changed commanders several times over the years, refusing outside promotions, favoring only commanders who have served in lower echelons of the 9th Cav.  In remembrance of the fallen 3rd Army, the 9th Cav wear a black all-weather cloth of heavy tyvek draped over the right shoulder of their 'Mechs, bearing the 3rd Army logo.  With this cloth hanging over the standard Jurai paint scheme, the 9th Cav 'Mechs strike a vivid image, making them the most recognizable unit in the IJAF.

True to their name, Jurai's oldest surviving regimental task force, the 5-212 are one of the galaxy's most feared armed units.  Comprised of only seasoned commanders and elite pilots, the 5-212 comprise the spearhead for the the core of Juraian shock troops. Holding the IJAF's highest kill-to-loss ratio by a landslide, the unit is made up of hardened warriors, psychopaths, and berzerkers.  The very presence of 5-212 on the battlefield has lead to planetary surrenders, and in one case an entire Clan's surrender. Shortly before the Battle of Herotitus, Clan Black Lotus surrendered holdings in entirety upon communication to their Khan that the 5-212 was approaching his command installation.

This effect works in reverse as well.  During the Battle of Drumsfide, disillusioned and starving Jurai regiments from the 4th and 5th armies, enbroiled in bitter trench warfare for months, were inspired into leading a successful assault on the capitol city upon hearing news of the 5-212's reinforcement -- before the regiment even landed planetside.

Preferring the largest, most vicious BattleMech designs in existence, 5-212 is sometimes nicknamed “The Hammer” among other IJAF units.  One of the rare groups to forgo standard Juraian black & purple scheme, 5-212 has always preferred camouflage matching their battlefield conditions.  The regiment's willingness to accept pilots with “irregular” psychological profiles has benefited their tenacity and bolstered their notoriety.  However, it has also led to the unit's grim tradition of “wearing” the mangled bodies of dead enemy pilots, crucified as a Jurai emblem on the 'Mechs.  This grizzly and odious display has been discouraged by IJAF command for years, however it is unlikely to ever change given the fearsome reputation of the 5-212.