Why do you have national monuments?
to honour ones that faught in the war
Alaska has eight national parks (some are also preserves), three national monuments, and three national preserves not connected with any national park. California has seven national parks (or eight, if you count Sequoia and Kings Canyon as separate), six national monuments, and one national preserve. I'll let you decide which state has the "greatest number."
The United States has many national monuments. A few of the national monuments include George Washington Birthplace National Monument is in Westmoreland County, Virginia; Little Bighorn Battlefield National Monument near Crow Agency, Montana; President Lincoln's Cottage in Washington, D.C.; and the Statue of Liberty. Additional U.S. monuments include Lincoln Memorial in Washington, D.C.; Mount Rushmore near Keystone, South Dakota; and Vietnam Veterans Memorial in Washington, D.C.