sentences:  From 2011 until 1st January 2017 the regiment was a part of the Light Brigade and on that date the regiment joined the Motorized Brigade.The 12th Regiment of the Line is the oldest active Belgian infantry regiment.It was created on March 31, 1831, and since 1984 has been authorised to bear the title "Prince Leopold" which was originally bestowed on it in 1915, during the First World War.