The occurrence was the order of benevolent assimilation goal was to Americanize Guam and its people through Executive General Orders issued by Naval Governor.  What historical period?

The occurrence was Pres. McKinley's Executive Order on Dec. 23, 1898, placed Guam under control of the Navy Department as a military base known as the US  Naval Station Guam and made provision for a naval governor. What historical period?

The occurrence was Guam in the SP-AM War Captain Henry Glass, USS Charleston: June 20-22 on his way to Manila, claimed Guam in bloodless battle.  What historical period?

The occurrence of the Treaty of Paris was Dec. 10, 1898, Cuba, Puerto Rico, P.I., and Guam ceded to the USA.  P.I. and Guam purchased for $20 million and other Micronesian Islands sold to Germany (geo-politically divided).  What historical period?

The occurrence was the Guamanian Identity which political protests to US Congress, Guam Congress made as local advisors to Naval Governors, and Guamanians pushed for US and /or local citizenship throughout 1910s-1930s.  What historical period? 

The occurrence of Leary's Proclamation on Aug. 10, 1899, Capt. Richard Leary appointed as the first American governor, formally proclaimed and declared Guam a US territory, and issued 21 executive orders as laws of the land.  What historical period?