N'ọgwụgwụ afọ 1944, Hayler na ụgbọ mmiri ya kwadoro mwakpo amphibious na Leyte
, bụ ọrụ amphibious kachasị ukwuu na mpaghara ndịda ọwụwa anyanwụ Pacific wee nata Legion nke abụọ ya maka iduzi ụgbọ mmiri ya. E wepụrụ ya na Machị 1945 ma nye ya iwu ka ọ laghachi na United States, ebe o jere ozi dị ka onye otu General Board nke Navy ruo ọgwụgwụ nke Agha.