 In 1920 a French military aviation mission opened a flying training school.The 'Cuerpo de Aviacion Militar de Guatemala' was established in 1929 – with pioneer pilots Jacinto Rodríguez Díaz and Miguel Garcia Granados Solís, among others – and started to expand in 1934.The outbreak of World War II hindered any further expansion until 1942, when Guatemala started to receive lend-lease military assistance.