5 List #2 Module 1: Thunder Rolling in the Mountains

reinforce

to add extra support

undermined

gradually weakened and destroyed

institutions

established customs and activities in a society

treaty

a written agreement between two opposing sides

invasion

an act of disturbing or breaking into without being wanted

disputes

arguments or debates

homeland

the country or place someone is originally from

plateau

a flat area on top of a hill or mountain

prairie

an open grassland

sustain

to support, nourish; to undergo for a period of time

subsistence

That which supports life or continued operation