Mars 3 has just started a new era, and i can't decide what chassis to build? Any recommendations?

well it helps to know what your rivals top players the era are building then what i do is i look at the top alliances at tick 100-200 and see waht there build is and say if 6 out of the top 10 are heavy builders then i mainly build vechs to have an advantage

its up to you really in a way builds are sort of like a rock paper scissors game (unlike heavies but they have other advantages explosives are killed frist in battles) Anyway just make your choice i mainly choose inf as when they die they are cheaper to replace just stick to the pro squads 10 armour 20 range for inf 5 armour and 10 range for vechs and 3 armour and 7 range for heavies and you should be fine and also only focus on one chasis

i know it doesn't help much but its the best advice ive got stick around to see if anyone else replies

I suggest inf, as the structure costs minimal amount, is quick to build and you can build it before the cav, heavy structure.

I would go inf, and get range ASAP.

exactly what i do

Depends on ur tactics and play style I think

infantry is recruited the fastest, recover the fastest in nuke, spy and ion attacks, and have bonus damage to vehicles. But the amount of EXP given to each infantry is very small.

tank is recruited the slowest, recover the slowest, no bonus damage and take more damage from vehicles. But have EXP advantages due to its high HP and small number.

vehicles is somewhere between them. average recruit speed, average recover speed, have bonus damage to tank and take more damage from infantry. Gain EXP faster than infantry but slower than tank.

I would do inf,
inf has advantage vs vehicles
vehicles have advantave vs heavies
heavies have advantage vs nothing

inf builds in 2 ticks
vehicles build in 4 ticks
heavies build in 6 ticks

So inf is best + you dont have to build the vehicle and heavy structure this way.

-luffyelric

for quick start and expansion both inf and vehicls can be used.
upto lvl 3 structure can be made in paused time.
but most of the alliances will be full inf and veh have disadvantage.
so inf better.
and its better to keep one chassis from begining and afterwards.

Inf as they get a 25% bonus againt vech and get no bonus against them.

the choice of which chassis you build is entirely dependent of what everyone else is using... lets say last era some alliance won with vehicles
everyone wants to build vehicles now because they think its obviously the best since someone won with it. it would be a good move for you to make a chassis that counters what everyone is using at the moment. then lets say you win an era then everyone thinks that infantry are awesome
so then everyone makes infantry and the cycle continues
goes to mech
then back to vehicle
gotta feel around and know what everyone is using these days ;D