Why does "should" come before the subject?
I was watching King Arthur when I came across the strange order of words "should they". This is not a question so why does "should" come before "they"?
Arthur: I'm to be their commander?
Pelagius: Yes. But with this title comes a sacred responsibility to protect, to defend, to value their
lives above your own, should they perish in battle to live your life gloriously in honor of
their memory.