100 exp. and a skill of at least 10
You win games to earn EXP.
if you lose too much on a ranked playlist in matchmaking you can lose exp
you go up exp by winning and lose exp by quitting
13,034,431 EXP
to get it, you have to have 7 exp in a playlist on the seventh of the month. on the seventh, try going into something you dont play much and earn 7 exp.
no you can't so you need to wait till the seventh and get seven exp in the seven on seven catergory on the sevnth of the month
just by playing online matches and earning exp. I think you need to get 600exp. to become a general.
You can see on your start screen (press start [just saying incase there are noobs reading this]) or for a more detailed visit Bungie.net then go to stats then to halo reach then you can type in your gamer-tag.
Go to Halocharts.com to see
keep doin matchmaking.
yes if the exp goes under the exp that you needed to go up a grade u will be degraded