Were the Battle of Antietam and Operation Undertone both during World War I?
Battle of Antietam The Battle of Antietam , also known as the Battle of Sharpsburg, particularly in the South, was fought on September 17, 1862, near Sharpsburg, Maryland and Antietam Creek as part of the Maryland Campaign. It was the first field army–level engagement in the Eastern Theater of the American Civil War to take place on Union soil and is the bloodiest single-day battle in American history, with a combined tally of 22,717 dead, wounded, or missing.
Battle of Le Transloy The Battle of Le Transloy was the last offensive of the Fourth Army of the British Expeditionary Force (BEF) in the 1916 Battle of the Somme in France, during the First World War. The battle was fought in conjunction with attacks by the French Tenth and Sixth armies on the southern flank and the Reserve/5th Army on the northern flank, against "Heeresgruppe Rupprecht" (Field Marshal Rupprecht of Bavaria) created on 28 August, from the 1st and 2nd armies of the dissolved "armeegruppe Gallwitz-Somme" and the 6th and 7th armies. General Ferdinand Foch the commander of "groupe des armées du nord" (Northern Army Group) and co-ordinator of the armies on the Somme, was unable to continue the sequential attacks by the Anglo-French armies achieved in September, because persistent rain, mist and fog grounded aircraft, turned the battlefield into a swamp and greatly increased the difficulty of transporting supplies to the front over the few roads in the area and the land that had been devastated since 1 July.