Croatia had to beat Greece in the playoffs to qualify, but did so easily with a 4-1 win in the first leg.
Iceland topped their group which was no small achievement considering Croatia were the strong favourites.
Argentina scraped through qualification, on the back of sheer brilliance from Lionel Messi.
Christian Eriksen scored an amazing eleven goals during qualifying, including a hat-trick in the playoffs.
Peru beat New Zealand 2-0 in the second leg of the playoffs to book a place in Russia.
Australia played 22 games to qualify for the tournament, the most of any nation in history.
The French squad is stacked with quality players, so they are expected to get a long way in Russia.
Iran were undefeated during qualification, but they will do well to win a game in Russia.
Making their first appearance since 1998, Morocco didn't lose a game during qualification.
The Spanish sailed through qualifying, with their demolition of Italy in September being particularly impressive