1. In a small saucepan, combine the sugar and water and bring the mixture to a boil boil. Stir until the sugar is dissolved. Remove the saucepan from the heat and add the Thai basil sprigs, lemon strips, and orange strips. Allow
the syrup to stand at room temperature for 20 minutes, stirring often so the liquid can cool. Remove the basil sprigs, lemon strips, and orange strips and discard.
2. In a large pitcher, combine the basil syrup, wine, brandy, and orange juice. Pour the sangria into ice-filled glasses. Top off each glass with club soda and garnish with an orange slice.