Some mild innuendo.

A woman could be offering to spend the night with Steve McQueen at one point, but it is rather ambiguous and veiled.

Smoking: Cigarettes

Alcohol: Infrequent social drinking

There are battle scenes where people are shot and killed. A soldier gets blown up by a mine, no blood is shown. A Soldier screams while he is dying and suffering from his wound. Reese slices a German soldier with a butcher knife across the face many times, killing him. The German is not shown while he does this.