Answer:
The Gallipoli campaign was a major war operation. Stalemate basically is a situation where not a single side could win each other. So, the sentence "The gallipoli campaign became a stalemate" means the the gallipoli war operation ended up at both sides reaching a dead end and not being able to win each other.
Explanation: Answer: proctor
Act 1: We find out that Proctor had an affair with Abigail that he says he no longer wishes to continue. Proctor is skeptical of witchcraft and of Parris's claims of persecution and leaves shortly after Reverend Hale arrives at the Parris household