Bonjour est ce que vous pouvez m'aide à ce devoirs s'il vous plait. Merci d'avance

There are mistakes in these sentences. Correct them.

« I had 18 when the World War 1 started »
« I had hungry and I eated very unhealthy food »
« I saw the frontline with a telescope » ______________________________________
« There was rats everywhere » ____________________________________________
« I participated at the WW1 » ______________________________________________
« In the trenches, the life was rude » ________________________________________
« At the first plan, 3 soldiers sleaping » ______________________________________
« me and my friends was really terrified » ____________________________________
« I was soldier on 1915 » _________________________________________________