NZ Con 2008 (I think) we played part of the 1st Battle of the Marne - using Great War Spearhead. Table was 22 x 7 I think (might have been 18 x 7 - memory is fading). We had approximately 21 divisions in total on the table including 6 cavalry divisions. All in 6mm so roughly 12000 minis and 6 players to pull it off :)

Grozny, 54mm size in the grounds of Knuston Hall.

http://megablitzandmore.blogspot.co.uk/2014/03/the-assault-on-grozny-part-1.html

http://megablitzandmore.blogspot.co.uk/2014/03/the-assault-on-grozny-part-2.html
http://megablitzandmore.blogspot.co.uk/2014/03/the-assault-on-grozny-part-3.html

We have played big Napoleonic battles for about 35 years. That was the main reason for going into 6mm.

At one time our table was 17'x5' and we had terrain boards that could be shifted and changed if the battle moved off table. We never filled it and rarely shifted the table. For over 25 years now we have just used a simple ping pong table 9'x5'. Played almost every major battle on it.

This year our two major battles will be Waterloo 5,500 figures and Ligny 6,000 figures.

Playing Waterloo on a 18x6 foot table in a few months, reporting it on my blog and showing it at Joy of Six part way through. Every Battalion that was in the battle is represented but hopefully there will be enough space for attacks to develop and respond too.

We did Quatre Bras as a test and that worked well though it's much smaller

Ian

Luckily several WW2 games on 12 x 8 table and a thousand fig Indian Mutiny game that involved all 6 players command figure having his own objective and being required to issue orders in very bad British accents. After a few hours and beers we all sounded like Dudley Moore.