Where in this timeline was the Maryland legislature jailed on Lincoln’s orders, to prevent them from voting on secession?
You seem to have left out some significant milestones. Accidental?
It's a myth we've covered in detail on other threads.
The summary of it is that on April 29, before the Confederacy formally declared war on the United States, the Maryland legislature freely voted 53 to 13 against secession.
Nobody was then in jail or intimidated.
After the Confederacy's declaration of war on May 6, 1861, by Constitutional definition it became an act of treason for citizens of the United States to provide aid and comfort to their enemies.
So in September some Maryland officials were arrested, and there was never a vote to secede.
But before you jump to conclusions, remember that Maryland had only half the percentage of slave-holding families as, for example, Virginia.
Maryland's ratio was about eight non-slave holders to one slave holder, and that is reflected in the April 29 vote of 53 to 13 against secession.
So it's never been shown that enough Maryland legislators were arrested in September to have made Maryland change from Union to Confederacy.
“You seem to have left out some significant milestones. Accidental?”
No accident. BroJo has been schooled on all of this many times. There are comments on this thread which mention Massachusetts; BroJo would be well advised to get a clue and start thinking about those posts. Ah, the things he doesn’t know, or perhaps he does know and is fast and furiously ignoring it.
Don’t have time to school him on MA right this minute. Maybe soon.
And for a later date maybe a post on what Yankees (not to be confused with the good folks of states north of Mason and Dixon’s line) were up to with slavery (gasp!) in Louisiana and Cuba. Tsk, tsk, tsp.