i wonder what would happen if u could go back in time with like an abrams m1a1 tank.
What if Spartacus had a Piper Cub?
Without a HEMTT tanker full of Class III and a whole lot more just like it in a line behind him, the war would be over in about 6 hours. Except for the Abrams being a big static pillbox, of course, one that is terribly over-armored for the weapons of the day.
Not bagging on you too bad... I used to engage in the same sort of alt-history thought exercises. Because of the fuel and supply issue, I wanted to send back two deuce-and-a-halfs... one with an infantry squad, the other with Classes I, III, V, and VIII: "Beans, bullets, and band-aids", plus the fuel to tote them around. Everything else is field expedient or locally available.
When I was about 10-11, c. 1973-'74, I liked to think about how to explain things. One of my favorite fantasies at the time was having Benjamin Franklin, one of the most brilliant and knowledgeable men of his time, dropped into my lap via time travel. How many things that we take for granted today, things we use without thinking, things that were invented based on his discoveries, would we have to stop and think about before he saw them and fell dead of shock?
I mean, before you gave him a ride in your horseless carriage, you'd have to make sure the radio was turned off, lest he freak completely out. Mechanical locomotion is one thing; voices from invisible people is something else entirely!
Back to the OP: no, a couple of machineguns couldn't do the job. A half dozen well trained snipers? Maybe so.