A person has to make up for a missed Ramadan due to participating in the Palestine War but doubts making up for it

Q: I was in the army that participated in the Palestine War (Part No. 9; Page No. 287) in 1368 A.H. I spent a long time in Palestine including the blessed month of Ramadan. Currently, I do not remember whether I fasted, made up the days, or broke the fast during that month. After a long time, I met one of the people who had been with me in Palestine during the war and he told me that we did not fast that month. I found out that he made up for the missed days of fast in that month. As I previously mentioned, I do not remember whether I fasted that month or made up for the missed days of fasting of the month.My question is: What am I to do concerning the fast of this month and how can I make up for the missed days? I am now a diabetic old man and can not make up for the missed days of fast. I repeat that I do not know whether I made up for these missed days of fast or not. I ask Your Eminence to tell me the ruling on this and what I must do.

A: It is a duty upon you to make up for fast since you are not certain that you fasted. The principle is that you must still make up for the missed days of fast, especially since your colleague informed you that neither of you fasted that month of Ramadan. In addition to making up the missed days of fast, you must feed a Miskin (a needy person) for each delayed missed day of fast the equivalent of 1.5 kg of the staple food. If you are unable to make up the missed days of fast due to a chronic illness, then you have to feed a poor person for each missed day of fast the amount of food we mentioned above.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.