There may be disturbances and few attacks but nothing concrete. You need to remember what foces US sent into Canada. That not going to change. Poorly led and ill equipped state militia. Up against much larger British army. While some American wank supporters are all hollering that USA going to win my $$ still on New York State militais being soundly defeated and wiped out.
Yes, because the US certainly wouldn’t build up its army in preparation for a war with a Britain with enough troops to make “A matter of marching” completely unfeaaible rather than mostly unfeasible...