As well as being your Independence Day, the 4th of July 2018 is also the centenary of the Battle of Hamel which, among other things, is said to be the first time US soldiers went into battle under non-US command. Australian command in fact.
The battle was also notable for a few other firsts, including the first use of resupply from aircraft via parachute (a system developed by an Australian), as well as resup via tank, and the first use of wireless for comms on the battlefield, as this was used to report from objectives as they were reached. It was also a very successful example of the use of combined arms in the assault on enemy trenches, with artillery, infantry, tanks and air support (ground attack, as well as resup and recon) coordinated together in an action which reached all of its objectives in just 93 minutes - a bare three minutes over the planned time.
US AEF troops participated, embedded in Australian formations, as a means of giving them some battlefield experienced, the US having only lately having become involved in the Great War. Evidently the date of 4 July was chosen by our General Monash "out of deference" to the doughboys. By all accounts they fought bravely, and fourteen Americans were decorated. Quite a few Australians too, including two VCs. A couple of hundred US casualties too, and over 1000 Australians.
, amazing, a guy who hardly saw a shot in anger until about 50, from Australia yet, becomes the best general of the war.