This is the second theme of Jupiter, from Holst's Planets Suite.  Holst was interested in astrology, so he got the idea of a tone poem in 7 parts, one for each planet, evoking its astrological or mythological character. He wrote it in 1914, before the outbreak of war, so the people who have claimed that parts of it evoke the tragedies of the Somme and Paschendale, especially Mars, the bringer of War,  have got their chronology all mixed up.

This tune starts off on the French Horns, and is taken up by the trumpets and then by the woodwinds.