Some rocket families have been used for both military and civilian purposes (e.g. Atlas). Do the military versions use the same fuel as their civilian counterparts?
In general, yes. The selection of fuels for military rockets is driven by different factors than that of civilian rockets, but for a specific design the same fuel is used.
The only exception I can think of is that the Redstone military rocket was originally developed for 75%/25% alcohol/water with LOX, but in its satellite launcher versions (Jupiter C / Juno I) it used hydyne fuel for increased performance.
Syntin is special synthetic hydrocarbon fuel that have some better energy than kerosene, so the rocket had better performance - about 200 kg to low orbit.
Soyuz-U2 was launched 72 times and experienced no failures over its operational lifetime. It was used to launch manned missions - Soyuz T-12 to T-15 and Soyuz TM-1 to TM-22, as well as Progress supply ships. The rocket was operational in 1982-1995. Then it was announced that the Soyuz-U2 had to be retired, as the performance advantage gained through the use of syntin did not justify the additional cost of its production.