well ay, in my opinion:
what does make the marine and noir lime the best soldiers on earth:
- they are brave
- they are patient
- true heroes who can be responsible for most of the things
- the only volunteers who decide to go into the ass pain travel unlike the other pussy marines
- they being very potential to save the world
- they are well trained
- eliminated a lot of enemies
well generally, they are the only people who volunteered to go fight for the earth race, which proves that they are really brave to have the required endurance and qualifications to survive, they are definitely patient and confident, also responsible on their job and they do really know what are they doing, so what's in your opinion, feel free to reply!