At the beginning of the play, Macbeth didn't have any enemies. By the end he had lots, including Malcolm, Donalbain, Fleance and especially Macduff.
Young Siward is the first to fight Macbeth in Act V. Macbeth kills young Siward.
Macduff teams up with Malcolm to fight Macbeth. In fact they meet in England.
Macbeth has been surrounded by his enemies; there is no retreat. He is like the bear in the then-popular sport of bearbaiting, where a captive bear was chained to a stake and attacked by dogs. There was no retreat for the bear either.
Platypuses do not have enemies as such: they have predators. They are not at all well equipped to fight enemies, but avoid them by swimming and hiding in their burrows.
Macduff
No, the Polish fought the Soviets, but they were already fighting the Germans all alone and weren't able to fight two enemies.
Macbeth was macduff's host and he was under macduff(in ranking)
Fleance.
they would fight alone
They fight in Act I, sc 7 because Macbeth decides to back down from killing Duncan. Lady Macbeth challenges him in two speeches, where she questions his manhood, until he finally agrees to kill the King again.
he refuses to fight him