The Battle of Gettysburg and Confederate Brigadier General Jeb Stuart's ride will be the subject of a slide show and talk at 7 p.m. Wednesday by Civil War author and speaker Eric Wittenberg of Westerville, Ohio, at the Butler YWCA, 120 W. Cunningham St.

The program is sponsored by the Butler County Civil War Roundtable.

For more information, call Bill May at 724-504-3648.

RENFREW — The Butler County Humane Society will have its annual Spring Fling Community Expo from 10 a.m. to 5 p.m. Saturday at the society, 1015 Evans City Road.The event will feature vendors of all kinds, food, games and pony rides for children, face painting, a Chinese auction, a rummage sale and a visit from Steelers mascot Steely McBeam from 1 to 2 p.m. There also will be a rabies and microchip clinic from 2 to 4 p.m.For more information, call 724-789-1150.

MARS — MHY Family Services (formerly Mars Home for Youth) will have its second annual “Swing Into Summer” Fundraiser Dinner at 6:30 p.m. May 18 at Twelve Oaks Mansion, just off Route 228 in Mars.This year's “Swing Into Summer” will feature a cocktail reception, dinner, silent and live auctions and entertainment. The Frank Piscopo Band will provide musical entertainment.For more information, visit www.mhyfamilyservices.org or call 724-625-3141.