Can my brother sponsor my mom and me?

Hello, You did not provide information about your brother's immigration status. Your family members may be eligible for sponsorship for Parole-in-Place by your brother. Parole-in-Place allows certain undocumented close family members of armed force members or veterans to reside in the U.S. and qualify for certain benefits, including the ability to file for a green card in the U.S. even if they had entered the country illegally. You should speak to an attorney in your local city to see if you or your mother can file for Parole in Place as a first step in getting legal status in the U.S. Even if you do not qualify, your mother can file for you after she obtains legal status through your brother. Our law office has filed for Parole in Place for undocumented family members of U.S. armed service members and so I consider it to be very useful in cases like your family's. If you want to join the military you should contact the nearest armed forces recruiting office in your city. Good Luck.   Disclaimer: The information above is of a general nature and is not, nor is it intended to be legal advice. For specific legal advice about your situation, please speak to your immigration attorney.