The showcase below goes as far back as 2005, the year GlobalFirepower.com launched. In regards to the rankings, keep in mind that the GFP formula has changed quite a bit since the early days, bringing along new factors to consider while, in some cases, doing away with old ones. The original site tracked 25 global military powers while, today, this has reached 138 nations. As a result, direct year-to-year comparisons are sometimes difficult to obtain (particularly against the crude formula used in early years). Only the top 25 world military powers are shown in each list below.