and they do so sort of very and there's a couple of guys i'll highlight here i won't too much about steven kearney, though. he's a really important army. he captures santa fe enroute to war and establishes a militaryo code of governance that's really in military history. but perhaps the about in terms f army exploration in this period is this dude john c, fremont, who is a member of the army corps of topographical who is sent explore california and the pacific coast in 1840s. fremont makes several expeditions to california. but in 1846, his is the one that helps conquer california for the united states subduing the bear flag, revolt and proclaiming united states sovereignty. california out of the hands. mexico, with the help of the navy. i always want to be very clear. the navy is involved. but what we really care about are these army guys. but in 1846, without firing a shot, the captures california and fremont basically free to establish a headquarters and start to map and explore california and. i think we all know what that exploring is going to turn up we'll talk about it■ in a minut