Michael waited for lights-out

[Bassim]

Would you please correct my mistakes in this very short text?

Michael waited for lights-out and sneaked out of the barracks. He ran through the darkness to the nearby village where he knocked at the door of a solitary house. The door opened and Michael proffered the money. The man gave him a bottle. As soon the door closed, Michael opened the bottle and swigged. He immediately felt better and calmly strolled back. The alcohol was his saviour. Without it he wouldn't stand the life in the military for a single day.

 

[emsr2d2]

Would you please correct my mistakes in this very short text?

Michael waited for lights-out and sneaked out of the barracks. He ran through the darkness to the nearby village where he knocked at the door of a solitary house. The door opened and Michael proffered the money. The man gave him a bottle. As soon the door closed, Michael opened the bottle and [STRIKE]swigged[/STRIKE] took a swig. He immediately felt better and calmly strolled back. [STRIKE]The[/STRIKE] Alcohol was his saviour. Without it, he wouldn't be able to stand [STRIKE]the[/STRIKE] life in the military for a single day.

See above.
BrE would tend to use "knocked on the door".
"swigged" would be OK if you followed it with "from it" or "from the bottle".
No article is needed in "Alcohol was his saviour" because you are talking about alcohol in general, not only the bottle he just received.