On this weekend, when we honor those brave service members who gave their lives for the cause of liberty, for the cause of our country, we should take a moment to remember that not all fell in battle. Those who gave their all in other incidents - training accidents, for example - made their sacrifice for our nation as well. 

Now, the fate of 19 U.S. Navy sailors who perished after a collision at sea in 1917 is a little better understood, as divers have found their last resting place, the undersea grave of the submarine USS F-1.

A military submarine that crashed over 100 years ago has finally been found on the bottom of the ocean.

The huge Navy vessel was discovered off the coast of California after being lost during a training accident in 1917.

It was spotted in sand next to a training aircraft that had crashed into the sea in an unrelated incident in 1950.

Researchers released incredible images of the sunken vehicles after finding them using advanced underwater technology and expert divers.

See the linked article for the photos; they are amazing. View them with respect, as well; this is, quite literally, a grave. The F-1 went down after a training accident:

The US Navy submarine USS F-1 collided with its sister sub - USS F-3 - during surface exercises off the coast of San Diego on December 17, 1917.

The F-3 tore a massive hole in her sister ship's port side, causing the F-1 to sink in just ten seconds, the Submarine Force Library and Museum Association says.

Nineteen out of its 24-man crew were unable to escape, going down with the vessel as it sank to the seafloor.

These men gave their lives for America, even if they didn't fall in the Great War we were engaged in at the time. We should remember them and respect their sacrifice.

See Also: NATO Secretary General Reports 4 US Soldiers Dead in Eastern Europe, Details Scant

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Being in the military is a dangerous business. When I was in Army basic training all those years ago, the shouting drill sergeants warned us that we had chosen a risky business to enter into. Every one of them, it seemed, had a tale to tell of someone they knew who had been seriously injured or killed in a training accident or some other such mishap; one that sticks in my mind was the story our senior drill sergeant told us of when he watched helplessly as an M-113 armored personnel carrier rolled over on his friend, killing him instantly.

Almost everyone I know who has worn Uncle Sam's colors either has such a story or knows someone who does.

We all join the military knowing it's a dangerous business. We know we may be called upon to pay that ultimate price. General Patton reminded us that the objective was to "...make the other poor dumb SOB die for his country," but the enemy fights back, too. But the danger isn't just in wartime. We are still called upon to go to the field, to work around weapons and heavy vehicles, often in bad weather, often in dangerous conditions. Accidents are part of the risk we accept.

On this Memorial Day weekend, we take time to remember and pay respects to the fallen. The 19 men of the USS F-1 fell for the United States as surely as any of their brothers who were fighting in the North Atlantic or France at that time. We should remember the men of the F-1, too.

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