What key steps were taken prior to the Battles of the Leyte Gulf?

The Battle of Leyte Gulf (Filipino: Labanan sa Look ng Leyte) is considered to have been the largest naval battle of World War II and, by some criteria, possibly the largest naval battle in history, with over 200,000 naval personnel involved.[4][page needed][5] It was fought in waters near the Philippine islands of Leyte, Samar, and Luzon, from 23 to 26 October 1944, between combined American and Australian forces and the Imperial Japanese Navy (IJN), as part of the invasion of Leyte, which aimed to isolate Japan from the countries it had occupied in Southeast Asia which were a vital source of industrial and oil supplies.

By the time of the battle, Japan had fewer capital ships (aircraft carriers and battleships) left than the Allied forces had total aircraft carriers, underscoring the disparity in force strength at this point in the war.[6][page needed] Regardless, the IJN mobilized nearly all of its remaining major naval vessels in an attempt to defeat the Allied invasion, but it was repulsed by the U.S. Navy's Third and Seventh fleets.

Explanation:

payments were made after the 1940s.

in the 1980s, a commission held investigations and made recommendations.