They destroyed the castle gate using a battering ram.

He is good at devising strategies for siege warfare.

Mr. Gohyakujo is my best friend.

As the phrase 'If it does not sing, let's wait until the cuckoo sings' suggests, we should wait patiently until the opportunity comes.

He has done everything he can to prepare for the exam, and now he is in a state of 'doing all that is humanly possible and waiting for fate to take its course'.