Our coverage of the Lincoln 16 Green Fields Beyond has ended but here is a selection of pictures from the procession and tonight's finale.
- An outdoor spectacular in the centre of Lincoln to mark 100 years since Lincoln-built tanks were used in WWI
- Live updates on Saturday 16 July 2016
Poppies were projected on the castle wall as the newly-weds in the play were reunited.
A highlight of the performance was a pyrotechnic and light show.
Soldiers injured in battle returned to Lincoln. They were the lucky ones.
Women playing football during the war was a common sight.
More of the cast taking part in tonight's production.
The audience is treated to a spectacular backdrop as the story of the invention of the tank in Lincolnshire is told tonight
Soldiers in the play discuss whether the tank can change their fortunes in the war.
Green Fields Beyond is part of Lincoln's 100th anniversary commemoration of the events of 1916 - including the Battle of the Somme and the production of the tank.
The name of this event is taken from the unofficial tank regiment motto "Through Mud and Blood to the Green Fields Beyond".
There is a bit of a surprise planned for the end of tonight's performance.
The cast are putting their heart and soul into the show:
Plans are discussed for a land battleship.
The crowd gets its first view of the tank at Lincoln16.
About 3,000 people are watching the performance in Lincoln Castle
About 100 people are taking part in tonight's performance of Green Fields Beyond at Lincoln Castle.
Tonight's production is taking place inside Lincoln Castle - home to one of four remaining copies of Magna Carta, which was signed by King John at Runnymede in 1215.
The castle is also currently hosting an exhibition of poppies marking the centenary of World War One.
A view of the cathedral from inside the castle - did you know Lincolnshire has its own flag - the one in the picture.
It took just 141 days for Fosters of Lincoln to turn rough blueprints into a fully constructed battle machine.
Eventually individual tanks would be named by their crews.
Like ships many of them were given female names: for example, the tank in the Museum of Lincolnshire Life pictured below is called Daphne.
Melvyn Prior (A.K.A the Mayor of Lincoln) addresses the crowd. He really is a true pro.
Estimates say about 3,000 people will watch tonight's performance of Green Fields Beyond - a production which has been more than two years in the making.
You've been found out Melvyn.
Some of the cast enjoy a bit of down time ahead of tonight's finale.
For those who know Lincoln, the queue stretched from the castle entrance to the cathedral, and round the side to Eastgate.
Some inside the castle appear to have found the ideal place to watch the performance .
BBC Lincolnshire Live
There's been quite an audience in St Benedicts Square watching the actors perform.
I've told our reporter not to be playing Pokemon Go while covering #Lincoln16.
BBC reporter Alex Rhodes is on queue patrol.
The first design was deliberately falsely described as a water carrier for Mesopotamia to conceal its true purpose.
The workers referred to them as "water tanks" or simply "tanks" and the name stuck.
Hear how thedevelopment of the tankwas kept top secret...
The planning and rehearsals have taken months but finally everything is ready for tonight's performance in Lincoln.
Crowds gathered in Castle Square to see the finale of the procession.
Rachael Shaw tweeted to say she enjoyed the parade.
You can watch a live stream of tonight's event on this page, or on BBC Radio Lincolnshire's Facebook page.