L2 visas are granted together with L1-A/B visas which are 3+2+2 or 3+2 years respectively, not 1 year initially.

And you cannot get a US visa in Belarus: "We apologize for the inconvenience, but due to the decision by the Belarusian government in 2008 requiring the U.S. Embassy to reduce its diplomatic staff from 35 Americans to 5, the Embassy was technically forced to suspended full visa processing services indefinitely. Residents of Belarus whose applications do not fall under the above categories should make arrangements to apply for a nonimmigrant visa at another post."