Soyuz ST-B/Fregat-MT was the higher-performance French Guiana launch configuration based on Soyuz-2.1b, adapted for the Guiana Space Centre and paired with the enlarged-propellant Fregat-MT upper stage. Arianespace operated the expendable configuration from the first Kourou Soyuz launch in 2011 through the final Soyuz flight from Europe's Spaceport in 2022.