Laufey your Bio looks good but there's just a few things I wanna point out time-wise to make sure we're on the same page:

4551 - Callus is born
[i]+18[/i]
4569 - Callus is 18, begins to work at mines
[i]+3[/i]
4572 - Callus is 21, trapped in mines from secessionist attack (JFA not yet formed), Callus escapes and moves to Mars (you should correct the offer to "go anywhere in Sol," as only Earth, Mars and Asteroid Belt are inhabited by humans at this point), works at Anubis bar and club
[i]+1[/i]
4573 - Callus is 22, learns to read (apparently), enlists in Martian Military Police (there's no "war-time armed force" because there has been peace since the late 2000's)
[i]+5[/i]
4578 - Callus is 27, JFA forms and attacks (this is actually 8 years off. 4598 -12 = 4586, the year the JFA declared war on the EMA)
[i]+7[/i]
4585 - Callus is 34, taken by OSS. (with the 8 -year fix, this would be 4593. This is still an issue though, as the Beta stage of OSS (the players) doesnt start until AFTER Sabre 01 goes AWOL, in January of 4598.)

Everything checks out content-wise, but you need to change some time-gap numbers. The end of the time line should look like this:

4572 - Callus is 21, trapped in mines from secessionist attack (JFA not yet formed), Callus escapes and moves to Mars (you should correct the offer to "go anywhere in Sol," as only Earth, Mars and Asteroid Belt are inhabited by humans at this point), works at Anubis bar and club
[i]+1[/i]
4573 - Callus is 22, learns to read (apparently), enlists in Martian Military Police (there's no "war-time armed force" because there has been peace since the late 2000's)
[i]+13[/i]
4586 - Callus is 35, JFA forms and attacks.
[i]+12[/i]
4598 - Callus is 47 (as stated in your CS), taken by OSS (Operation Shadow Sabre).