Fall 1917 interesting field post from Estonian national unit, Tartu-Velise

Interesting card posted in Tartu November 16, 1917. Text reads “I live Tartu at the moment, but soon we will be sent away throughout the country as defense squads to stop looting Russians. Soon will write more about my life and circumstances. With Greetings, Hans”. Note that Estonian units we still part of Russian Imperial Army. The unit from where the card is sent was likely Eesti Tagavara Jalaväepataljon which was stationed in Tartu.