Aggressive Mode in IKEv1 uses how many packages for negotiation?

Aggressive Mode in IKEv1 uses three packets for negotiation, with all data required for the SA passed by the initiator1. The responder sends the proposal, key material, and ID, and authenticates the session in the next packet. The initiator replies and authenticates the session1.

The other answers are not correct because they either refer to the Main Mode in IKEv1, which uses six packets for negotiation2, or they are irrelevant to the number of packets used in Aggressive Mode.

Understand IPsec IKEv1 Protocol - Cisco

Negotiation modes for phase 1 - IBM

FAQ-What are the differences between IKEv1 and IKEv2- Huawei