Human Events has a tribute to the Marines on their 232nd birthday (10 Nov 2007). They are the third oldest* of the services, predating even our Declaration of Independence. My USAF is quite young by comparison (started as a separate branch on 18 Sep 1947). But always remember that 75% of the earth is covered by water and 100% of the earth is covered by air.
*Marine corps founded 10 Nov 1775
US Navy found 13 Oct 1775
US Army founded 14 Jun 1775 as the Continental Army. Became the US Army on 3 Jun 1784.