Apart from a mere ten M2 half-track cars, the Guardia suffered from a chronic shortage of light armored personnel carriers (APCs) for its infantry units, forcing them to rely on their extensive fleet of soft-skinned transport and liaison vehicles. These ranged from World War II-vintage Willys MB ¼-ton 4×4 jeeps and Dodge WC51 ¾-ton 4×4 utility trucks to more modern Willys M38A1 MD ¼-ton 4×4 jeeps and Willys CJ-5 4×4 jeeps, Spanish Ebro trucks CJ6b 4×4 jeeps, Santana Series III (Spanish-produced variant of the Land Rover Series III model) and Toyota Land Cruiser (J40) light pickups, VIASA-Ebro trucks "Campeador" one-ton pickups (Spanish-produced variant of the Jeepster Commando), M151A1 ¼-ton 4×4 utility trucks (nicknamed "Pumas" by the Nicaraguans), Dodge M37B ¾-ton 4×4 1953 utility trucks (nicknamed "Chatas" by the Nicaraguans; in 1978, one M37B was converted by the GN engineers into an armored car prototype dubbed "La Trigra", but the whole project was discontinued due to the lack of funds), and Israeli AIL M325 Command Cars ("Nun-Nun") and Mercedes-Benz Unimog 406 light trucks. Heavy transport vehicles were also employed, ranging from older World War II GMC CCKW 2½-ton 6×6 and Chevrolet G506 1½-ton 4×4 trucks to newer US Dodge W600 Power Wagon 4×4 medium-duty trucks, US M35 series 2½-ton 6x6 cargo trucks and US M39 5-ton (6x6) cargo trucks, and Spanish Pegaso 3046 4×4 and 3050 6×6 heavy-duty trucks, which the GN received in both civilian and military versions.