Zhukov, now a lieutenant-general, is assigned to the First Soviet Mongolian Army Group in July. After being given command of the group he prepares to take on the Japanese. The conflict climaxes at the Battle of Khalkin-Gol, beginning on 20 August.
If you have a normal 28 day cycle, you are most likely to become pregnant when you have unprotected intercourse approximately 2 weeks before you anticipate your period to start.
Answer: It is highly unlikely that you got pregnant if your period came after you had unprotected sex. Though it is not entirely out of the realm of possibility. This is particularly true if you had your period the day after you had sex. It is important to figure out if you had your period or if you are simply having vaginal bleeding. This bleeding may not be your period but may be something else like implantation bleeding, which would possibly indicate pregnancy.