|Commanders|| Marco Rossi|
|Area of Operations||Worldwide|
|Enemies With|| Rebel Army|
Martians (Metal Slug 2 & 3)
Ptolemaic Army (Metal Slug 5)
Invaders (Metal Slug 6)
|Affiliated With|| P.F. Squad|
Ptolemaic Army (Metal Slug Attack)
The Regular Army is the protagonist force from the Metal Slug Series.
It is a world government coalition force used for various tasks. However, they never try to avoid direct conflict, working more without diplomacy. Because of this, they will work through many of their special operation squads and intelligence divisions, even hiring mercenaries if deemed necessary.
They are at war with the Rebel Army for the most part.
The Super Devil seems to have taken an interest in the Regular Army. It offers the Regular Army aid, but only at extremely dire times.
- Rumi Aikawa (Sergeant and supplier)
- Madoka Aikawa (Private and supplier)
- Trevor Spacey (Sergeant)
- Nadia Cassel (Private and Secret Services agent)
- Hyakutaro Ichimonji (2nd Lieutenant)
- Tequila (Covert agent)
- Alisa Stewart (Engineer)
- Midori (Junior Engineer and mechanic)
- MS-Alice (Regular Army´s A.I created by Marco Rossi)
- Matilda (Scientist)
- Selina (Merchant and supplier)