When I graduated from Marine Corps Recruit Depot Parris Island, South Carolina, I thought I had finally arrived.

• —I had earned the title Marine.
• —I had survived boot camp.
• —I had earned the Eagle, Globe, and Anchor.
• —Most importantly, I thought I was finally one of them.

Boy, was I wrong.

After graduation and ten days of leave, I reported to the School of Infantry. Like many young Marines, I thought boot camp would be the hardest part of becoming a Marine. I was wrong about that, too.

Sleep Was a Suggestion

At boot camp, there is at least a schedule for sleep. As I remember it, there were roughly eight hours designated for sleep each night. Now, whether a recruit actually got eight hours is another story.

• —You might be pressing uniforms.
• —You might be preparing gear.
• —You might be standing fire watch.
• —You might be trying to avoid becoming the center of attention for a Drill Instructor.

Still, the schedule acknowledged that sleep existed. At SOI, my memory is that nobody seemed particularly concerned about whether I slept or not.

The Marine Corps had already made sure I earned the title Marine. Now it intended to teach me how to be an infantryman. Those are two different things.

Still a Boot

I arrived at SOI feeling pretty good about myself. I was a Marine now. The Infantry NCO Instructors quickly explained that I was still a boot. A complete boot.

To be fair, they were right.

The instructors were Corporals and Sergeants from the Fleet Marine Force. To us, the fleet was almost mythical. These Marines had already done what we hoped to do.

• —They had served in infantry units.
• —They had experience.
• —They had credibility.
• —Many had deployed.
• —They knew things.
• —We knew very little.

Their mission was simple: teach us infantry skills. And perhaps more importantly, teach us how not to be such boots. Looking back, they had their work cut out for them.

The Best Leaders Don't Always Need the Loudest Voices

One thing that surprised me about SOI was the lack of yelling. At least compared to boot camp. Most civilians imagine infantry training as constant screaming and chaos. That wasn't my experience.

My Infantry NCO Instructors didn't need to yell. They had already earned credibility. They had already proven themselves. Sometimes they would give instructions at what seemed like conversational volume. Sometimes nearly a whisper.

And we moved. Immediately.

Leadership Billets and What the Instructors Were Really Watching

Another thing I appreciated about SOI was the opportunity to rotate through leadership billets. Different Marines were given opportunities to lead. Different Marines were evaluated. Different Marines were placed in positions of responsibility.

I noticed something interesting. Not everyone rotated through those billets. Some did. Some didn't. At the time, I wasn't conducting a detailed leadership study. I just wanted to graduate. Still, it became obvious that the instructors were evaluating more than technical skills. They were evaluating leadership potential as well.

Graduation Was Not Guaranteed

SOI also reminded me that graduation was not guaranteed. A few Marines didn't make it. Remember, every Marine there had already earned the title. Every Marine there had already graduated boot camp. Yet there was still attrition. There were still standards. There were still expectations.

The Marine Corps wasn't interested in handing out infantry qualifications simply because someone showed up. You still had to earn them. That lesson stayed with me.

How Little I Actually Knew

One of the biggest realizations I had at SOI was how little I actually knew. I had earned the title Marine. Nobody could take that away.

• —What I had not earned yet was experience.
• —I had not earned credibility in the fleet.
• —I had not earned proficiency as an infantryman.
• —I had not earned the respect that comes from performance over time.

The physical demands increased. The expectations increased. The responsibility increased. Every day felt like another reminder that boot camp was not the finish line. It was the starting line.

Graduation — and Then a Boot All Over Again

Then one day, I graduated SOI. I felt more confident than when I arrived. I knew more. I had gained skills. I had completed the course.

Then I checked into my infantry unit. And immediately became a boot all over again.

Apparently the Marine Corps has a very thorough boot-identification program.

Looking back, I laugh about it now. At the time, I was learning a lesson that would follow me for the rest of my life.

• —No matter how much you learn, there is always another level.
• —No matter how much experience you gain, there is always more to master.
• —No matter how much progress you make, there is always another challenge waiting for you.

SOI challenged me. It humbled me. It taught me valuable infantry skills. Most importantly, it taught me that earning the title Marine was only the beginning of the journey.

For a young boot who thought he had finally arrived, that was a valuable lesson.