Here is a map of Afghanistan. Remembering which countries it borders may prove handy in pub quizzes
As you can see from the index (ignore the numbers, they are out of date by two years) the side bordering Pakistan is the most hostile part of Afghanistan (E, SE, S)
This is where the different units are based, along with a handy guide in case you can't remember your nation flags. No, we don't know what Germany are doing up there either.