 Complete the following phrase:  42nd LAA Rgts, two SL troops and some motorised infantry. Eighth Army seized upon this collection to act as a blocking force, giving Calvert-Jones two infantry brigades in addition. Calforce held defensive positions at 10 LGs, providing its own artillery support from AA guns sited for ground tasks. It also developed dummy LGs, complete with fake AA positions. Calforce remained in position during the 