istila meaning in English

conquest [conquests]▼(victory gained through combat; subjugation of an enemy)
noun
[UK: ˈkɒŋ.kwest] [US: ˈkɑːŋ.kwest]

occupation [occupations]▼(control of a country or region by a hostile army)
noun
[UK: ˌɒ.kjʊ.ˈpeɪʃ.n̩] [US: ˌɑː.kjə.ˈpeɪʃ.n̩]

invade [invaded, invading, invades]▼(to enter by force in order to conquer)
verb
[UK: ɪn.ˈveɪd] [US: ˌɪn.ˈveɪd]

overrun [overran, overrun, overrunning, overruns]▼(to infest, swarm over)
verb
[UK: ˌəʊv.ə.ˈrʌn] [US: ˌoʊv.ə.ˈrʌn]