Complex sentence: This settlement establish the Swan River Colony with townsites at Fremantle and Perth, Western Australia, settler struggled with conditions it wasn't until the discovery of gold in the 1880's that the state experienced significant growth.
Split into simpler sentences: This settlement establish the Swan River Colony with townsites at Fremantle and Perth. The settlers struggled with the harsh conditions and it wasn't until the discovery of gold in the 1880's that the state experienced significant growth.