Resistance Base

Resistance Base (レジスタンスベース) is the base of the Resistance. In the first Mega Man Zero, the base has the appearance of an old building set underground. After the damage done by Neo Arcadia and Hanumachine in the first game, the Resistance moved to another base in Mega Man Zero 2, to which they operate from for the rest of the war.

The second base is more detailed and organized compared to the previous base, some of its features are a command room (with a transporter unit in it), Ciel´s quarters, 8 soldier rooms, and a maintenance room, a main elevator, storage facilities, library, conference room, two towers among other things, and labels/codenames to present what is the room above each door.

Second Base Floors
R. (Roof)
 * 1) A harbor where supplies comes in, a data libaray (1F-A), and a storage room (1F-B)
 * 2) A Hall (HALL) that resembles as a locker room with the 10 lockers, 2 benches, and plenty of boxs and another hall (ROOM) that has 4 rooms that also resembles as 4 dorms for the soldiers to house (02A, 02B, 02C, 02D)
 * 3) A Area where Andrew Strolls by on the left (in the 2nd game the was a room there but was removed in the 3rd game, it was also a dorm (ROOM). Also another hall (ROOM) and just like the 2nd floor (03A, 03B, 03C, 03D)
 * 4) A Lookout at left, a storage room (ROOM), a maintenance room (ROOM), a command room that leads to two more rooms for the scientist (CMD), Cerveau's lab (LAB), and Ciel's lab (CIEL)
 * 5) This is the area where they store their shells for loading the cannon on the two towers and a ladder for each tower to scan the area for Neo Arcadians.

Its seems to be located inside of a mountain or cliff adjacent to the harbor.

Although the base is new (according to Elpizo, newly constructed just as the second game began), Neo Arcadia is fully aware of its location, since Harpuia dropped Zero in front of the base, and after Operation Righteous Strike, they were going to destroy it with a bomb.

Resistance Trailer
The Resistance Trailer is a mobile unit of the Resistance, constructed by Ciel so that a part of the organization can move to wherever they're needed. At the beginning of Mega Man Zero 4, the trailer intercepts a Caravan, and they protect it from the forces of Dr. Weil trying to bring back the humans. After that, the trailer follows the Caravan to Area Zero, where they spend the rest of the game protecting the area and its populace from Operation Ragnarok.

The Trailer comprises of two connected, hi-tech box trucks, with each having two rooms. The first consists of the Command Center, occupied by Ciel and Rouge, and the second is Cerveau's lab. The second truck mainly consists of two bedrooms, one occupied by Alouette and another by Hirondelle; however, there's a computer in Alouette's room that can help Zero upgrade his Cyber-elf.