PBS
Pbs American Experience: The Invasion of Grenada
A concise article on the 1983 U.S. invasion of Grenada. Also, refers to the US Marine barracks bombing in Beirut.
US Navy
Grenada: Operation Urgent Fury
Excerpts from a military account of the Grenada invasion. Includes links to bibliography of books about the invasion of Grenada and a list of US Navy Ships participating in Operation Urgent Fury.
The History Place
The History Place: The Vietnam War America Commits
This site from The History Place provides a lengthy timeline, accented with many quotations, explaining how America came to be directly involved in Vietnam. This is a great site to check out on the subject.