मनटानायाव गिबि फालांगि खुन्थियाखौ 1807 माइथायाव बिगहर्ननि खुगायाव मोनसे फालांगियारि हानजाजों गायसनदोंमोन जायखौ मेनुयेल लिसाया सेन्ट लयसनिफ्राय मिसौरिसिम दैदेनदोंमोन ।
The first trading post in Montana was established at the mouth of the Bighorn in 1807 by a trading expedition that Manuel Lisa led up the Missouri from St Louis .