On 22 January 2015, the US increased its number of airstrikes near Mosul to a record number of 16. The airstrikes struck two large ISIL units, two ISIL tactical units, an ISIL building, an ISIL mortar team, and destroyed six ISIL culverts, two ISIL bridges, three ISIL buildings, an ISIL artillery system, 11 ISIL vehicles, an ISIL fighting position, six ISIL staging positions, two ISIL heavy weapons, an ISIL VBIED, and four ISIL armored vehicles.[17] The Royal Canadian Air Force has also destroyed numerous ISIL targets around Mosul in support of ground forces.[3]