While some early Close Air Support had been attempted and met with success in Nicaragua during the Interwar period, there was very little doctrine other than defining requirements and no structured development was completed prior to WWII. During Guadalcanal, Air Liaison Parties (ALPs) were improvised, trained on the island, and would only occasionally visit the front lines to observe targets. On New Georgia, the ALPs began briefing a day prior to action, offering occasional improvements.
Early Close Air Support efforts in Nicaragua during the Interwar period had some success but lacked comprehensive doctrine and structured development before World War II. During Guadalcanal, improvised Air Liaison Parties (ALPs) were used for observation and briefings, with limited effectiveness. On New Georgia, ALPs began to provide more detailed pre-action briefings.