Where was the Ah Boys to Men film series filmed?

The Ah Boys to Men film series has 2 titles (2012 to 2013). Wikidata records no filming place for them; Wikipedia names Singapore, Pulau Tekong, Sembawang Air Base and Basic Military Training Centre. Every place links to its source.

The productions, in order

Named in Wikipedia's own articles

Places named only in the titles’ Wikipedia articles.