III. Proceedings of the Conference: Continued Discussions of Conference Arrangements, Procedures, and Participants; United States Positions and Tactics at the Conference; Arrangements and Discussions on Collective Defense in Southeast Asia; Consideration of United States Military Intervention in Indochina; Proposals on Indochina by the Various Delegations; Efforts To End Hostilities in Indochina and To Preserve Peace in Southeast Asia; United States Participation in the Final Stage of the Indochina Phase of the Conference; Conclusion of the Geneva Conference (May 8–July 21)