Oh, Stargate. Let me enumerate the ways in which your canon sucks.

So. I'm trying to put together an approximate (hah!) timeline for Stargate prehistory. Of course, this is complicated by Stargate's own inconsistencies, and the fact that the film contradicts the episodes, which in turn contradict themselves...

Aaaanyhow. This is my rough approximation, giving preference to props (ID badges) rather than words, and the series rather than the film, and based on the idea that the series is set at about the same time that it came out:

1945: Stargate opened for the "first" time; Ernest lost.
1952: Jack born.
1965: Daniel born.
1968: Sam born.
1969: SG-1 back in time, meet Hammond, Catherine.
1973: Daniel's parents die¹.
1981/82...?: Sam's mother dies².
1985/86...?: Charlie born³.
1990/91 (during the Gulf War): Jack prisoner in Iraq for 4 months.
1995/96...?: Charlie dies.
1996: Stargate reopened, mission to Abydos (Daniel left behind).
1997: Apophis comes through Stargate, SG-1 formed, start of series.

Any thoughts gladly welcomed.

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1 NICK: I am sorry.
DANIEL: For what?
NICK: For not adopting you when your parents died.
DANIEL: You were travelling all over the world.
NICK: It wasn't your fault.
DANIEL: I was eight years old, how could it have been my fault?

2: I'm bad at assessing children's ages - she's, what, thirteen?

3: Honestly, so bad at assessing ages.