People in Cornwall are being encouraged to join with others across the country in a commemorative 'Lights Out' campaign on Monday. The Royal British Legion (RBL) event will see groups and individuals turn off their lights at 10pm, leaving a single lamp or candle burning to mark the declaration of the start of the First World War 100 years ago. The event has been inspired by the words of the then Foreign Secretary, Sir Edward Grey, who said: 'The lamps are going out all over Europe; we shall not see them lit again in our lifetime.' Britain declared war on Germany at 11pm on August 4, 1914. The RBL hopes that 100 million people will light candles to remember each of the service men and women who gave their lives during the war. Cornwall Council chairman John Wood is inviting people in Cornwall to join in. 'The First World War affected every town and village in Cornwall. At the outbreak in August 1914, thousands joined up, and the Duchy soon became a vital part of Britain's all-consuming war effort,' he said. 'Ships of the Royal Navy, aircraft and even airships arrived to defend the sea lanes off Cornwall's coastline, in a concerted campaign against marauding German submarines. On the home front, for four gruelling years, Cornish men and women worked tirelessly to support those fighting in distant battles overseas. School log books of the time, now on display at County Hall, show how children collected money for Belgian refugees, donated pocket money, collected eggs for wounded soldiers, and picked blackberries to make jam.  'A century has passed yet there is a strong connection with the First World War through family histories and community heritage.' The council has set up an area on its website containing information about the history of the war and how it affected Cornwall, titled Cornwall.   A total of 195 sets of Cornish brothers were killed during the conflict, along with 10 sets of Cornish fathers and sons. A special ceremony will be held at County Hall, Truro, at 10.30am on August 4 to mark the declaration of the war and remember those from Cornwall who lost their lives in the conflict.  In Liskeard, the RBL is inviting people to meet on the Parade at 10pm on Monday to walk to the town's war memorial for the Lights Out ceremony. The service will include the laying of 137 candles to signify all those from Liskeard who fell.