This Yank should have realised that the state flag for Alabama and the Cross of St Patrick flag were one and the same!
However, I am intrigued that the Alabama code describes it as a
‘crimson cross of St Andrew’, when St Andrew’s cross is more normaly
known as a white cross on a blue field, i.e. the flag for Scotland,
“the oldest continuously used sovereign flag in the world, having been
in use since 832 AD” (source: Wikipedia).
At least now I know where the Orange lodges are acquiring their St
Patrick’s cross flags, which I see regularly flown at various holidays.