I took part in World War II.

Dreams are a manifestation of the realization of wishes. You said you fought to the last man, which shows that you are brave. You surrendered and shot you, which shows that you have been oppressed by many people and things in real life, and you have been bravely supporting yourself. That dead German companion may be your partner, but unfortunately, he betrayed you. That's probably all, because there are not enough details.