Final answer:
The question asked cannot be answered without specific completion rates or numbers from the sites concerning their staff training progress. Neither the information about the anti-harassment tutorial rating nor military service details is relevant to determining staff training completion.
Step-by-step explanation:
To determine which site had completed most of its staff training requirement during the four weeks, we would need to look at detailed records or reports from the sites concerning their training progress. Unfortunately, neither the statement about the anti-harassment tutorial being rated highly informative nor the details about the U.S. Marine tank and the National Guard's involvement in the Iraq War provide quantifiable data pertaining to the staff training completion rates of specific sites.
Without such data, it's impossible to accurately answer the question regarding which site completed the most staff training. To do so, we'd need specific completion percentages or numbers that indicate the level of staff training achieved at each site during the mentioned timeframe. This is an example of a task that would likely be part of a human resources or management analysis in the business sector.