Usually marines ground combat.
2012
The first Battle of the Philippines & the Battle of Wake Island were BOTH begun on December 8, 1941 (coinciding with the Pearl Harbor attack on December 7, 1941).
John J. Pershing
Americas first battle was at pearl harbour in Hawaii.
Aachen in WWII
Northern Africa
John J. Pershing
Don Heinrich Tolzmann has written: 'German-American studies' -- subject(s): German Americans, Study and teaching 'German Achievements in America' 'Upper Midwest German biographical index' -- subject(s): Biography, German Americans, Indexes 'German-Americana' -- subject(s): Bibliography, Civilization, German Americans, German influences 'Covington's German heritage' -- subject(s): Genealogy, German Americans, History 'German Cincinnati (OH)' 'German-American biographical index' 'Ohio Valley German biographical index' -- subject(s): Biography, German Americans, Indexes 'Germany and America 1450-1700' 'The First Germans in America' 'German-Americana A Bibliography' 'The German-American experience' -- subject(s): German Americans, History, Miscellanea 'Cincinnati's German heritage' -- subject(s): Ethnic relations, German Americans, History, Social conditions
On 16th October 1939, three Spitfires from 603 Sqn RAF shot down a German recconaisance aircraft over Rosyth Royal Navy base in Scotland. This was the first air combat in WW2
North Africa
William Westmoreland requested combat troops after several serious setbacks against South Vietnamese forces. Eventually, there were over 500,000 Americans in Vietnam.