Mobile Suit Gundam - Feddie Hooligans

An Earth Federation Army special forces unit called Barghest (or BGST for short) in UC 0084 is created with Lieutenant Colonel Ito Tsurugi serving as its commanding officer, who is the only officer in the EF military known to carry a katana with him wherever he's on duty.

Zeon ace pilot, Commander Char Aznable, thought he could foil the Federation's plan to build a mobile suit by attacking their research base on colony Side 7. He was wrong. With a prototype already active, the besieged Federation forces strike back using their new weapon, the mobile suit Gundam, with devastating consequences. Amidst the fighting, young electronics wizard Amuro Ray is determined not to let his friends and family die in the crossfire. But what can one boy do to repel a squad of mobile suit-clad invaders? (Source: VIZ Media)

This story takes place during December 0079 U.C. where two brothers are forced to traverse the North American territory as the rear guard of the retreating Principality of Zeon forces, using MSM-04 Acguy amphibious mobile suits, after the Principality fails to capture the Earth Federation's headquarters at Jaburo. However it doesn't take long before these two brothers are the only ones left alive and are faced with the prospect of traveling over two thousand miles, without supplies and backup. Included one-shot: Kidou Senshi Gundam: Target in Sight