[RebelBanker]

The one with the AK-47's was Guns of the South which has no sequels. Turtledove also has an alternative history series in which the Confederacy won the War Between the States by more conventional means; the change point was some Confederate soldiers finding the lost copy of Lee's orders during the 1862 invasion of Maryland rather than them falling into Federal hands.

[BlazingArizona]

The one with the AK-47's was Guns of the South which has no sequels.

GOS is still the first book of the series. With the second book (I think it was "How Few Remain"), the outcome of a sovereign Confederacy in GOS is referred to, but the time-traveling Afrikaners had been quietly replaced by Lee's lost orders as having led to a victorious South. My impression is that Turtledove had gotten flak from Confederacy buffs who objected to the need for foreign help in a South-wins scenario.